"You all here today. I think in addition to these four uninvited guests, as well as me and Gao Yuan, and... Jiuzhangtang students, there are always a few of them who have rich collections of books at home, so they have been exposed to "Jiuzhang Arithmetic" and other jurisprudences."

Zhang Shou almost lit the emperor directly, but fortunately, he stopped the cliff in time and took the students of Jiuzhangtang to vaguely. At this time, he saw a lot of people with a few eyes floating in their eyes, including Lu Sanlang's two brothers, and he couldn't help but laugh.

Obviously, because the emperor praised Lu Sanlang's prodigal son for turning back and becoming a genius, the eldest and second brother of the Lu family were not convinced, and they had also gone to see the calculation of the scriptures.

Even if it is as the middle-aged man said just now, it is difficult for the people to find the trace of "Nine Chapters of Arithmetic" these days, but the Lu family must have it, otherwise where would the fat guy watch it? As for what the two brothers gained after watching it, as long as they look at them deliberately avoiding his sight, they will know that the nine dragons have different bad fortunes in their own way.

He smiled slightly and continued calmly: "But after reading it, I think most people left the book aside in confusion. Why did they have the opportunity to learn, but they couldn't go deeper? Is it because the book writers don't care whether others can understand it, so most people can't understand it at all?"

As soon as this was said, the middle-aged man who had accused Zhang Shou of anger before was stunned, and then he was so angry that he was furious: "It's nonsense! Zhang Shou, you are judging a gentleman with the heart of a villain! How can you misinterpret and slander those outstanding works left by those who have worked hard to leave after all?"

Zhang Shou was not angry by the other party's accusation. He glanced at Ye Mengqiu and stopped to understand the problem when he saw that the person had stopped to understand the problem. I wonder if it was disturbed by the tense atmosphere at this time, or if it was not enough to be able to do it, he laughed and said, "Those works are indeed outstanding. I want to ask you, can you understand all the "Ancient Absurd Sutra" mentioned by the young master Ye just now?"

The middle-aged man who was still indignant just now was choked and his face turned red. After a while, he said embarrassedly: "That's because I have shallow qualifications, so I can't fully understand the essence of my seniors!"

"You can consider yourself to be shallow in qualifications, but you are unwilling to slander your predecessors. You are indeed kind." Zhang Shou calmly praised someone, and then said leisurely, "However, even if you can't understand them all, you don't have to belittle yourself. Because even if the Imperial College was in the Tang Dynasty, middle school students in the middle school were not able to practice the ten books on the calculation of the scriptures."

"The ten books on the calculation of the scriptures, "Sun Tzu" and "Five Catholics", add up to one year, "Nine Chapters" and "Sea Island" add up to three years, and "Zhang Qiujian" and "Xiahou Yang" only need to practice for one year, "Zhou Feng" and "Five Classics" also add up to one year. "Records" and "Three Classics" are just enough to study them in the practice of the other eight classics. However, there are two classics that are different."

"One is the "Audio Sutra" mentioned by Mr. Ye just mentioned. This book alone has to be studied for three years. As for the other even more difficult book, the book that Gao Yuan mentioned just now, has been lost. It took four years to study it in the Imperial College Supervision Department during the Tang Dynasty."

"From the time of studying the ten books on the calculation of the scriptures, together, it is a total of fourteen years. Some people may say that scholars studied hard for ten or even decades in order to take the imperial examination. But you should know that it was the Imperial College, which dynasty and which dynasty was the Imperial College. In addition to the calculation of the subject, which other subjects can make people study for fourteen years, and may not be able to get started after fourteen years?"

Zhang Shou said that, then left his seat and arrived in front of the middle-aged man. He bent down to pick up the book he had just thrown to the ground. Then he gently brushed the dust on his head with his hand, and then turned around and looked at everyone.

"You just asked why the ancestors were once lost in the calculation of the scriptures, but instead wanted to introduce the symbols of small foreign countries. I can answer you now. In this way, take the second question in the ancient calculation of the scriptures, as an example, if the Taishi created the upright platform."

Zhang Shou snapped his fingers casually. This was his usual action in Jiuzhangtang. At this time, it was often time for him to write quickly and make people see his extraordinary skills in blackboard writing. Today, the students from Jiuzhangtang in Japan came to support Lu Sanlang, the first chief of the first sai leader. At this time, when he heard this sound, many people immediately felt cold on their backs and numb on their scalp.

Sure enough, the next moment, Ah Liu came in with a blackboard in one hand. Two pieces of heavy weight were gently put in front of Zhang Shou, and he gave him a white pen. He quietly retreated, but soon after, he went back and sent two more blackboards...

When he followed suit, he was able to make a round trip again and again, and a total of ten blackboards filled the huge area, and even the emperor could not help but cover his forehead. He just felt that Lu Sanlang had stolen the limelight by taking advantage of the assessment. Now, Zhang Shou, the teacher, personally rolled up his sleeves and went on stage!

However, the emperor was indeed very curious. You should know that the "Jigu Sutra" was as complicated as Zhang Shou said just now. Anyway, he didn't understand it back then... And after reading the "Geshi Mathematical New Edition" step by step, he was even less interested in reading the difficult and complicated questions and answers in the "Jigu Sutra".

"We can see that this upward viewing platform is in the shape of a slight boy. If you are not familiar with "Nine Chapters of Arithmetic" but have read "The New Edition of Ge's Arithmetic", then let's change the term, which is a rectangular four-edged platform. In other words, the upper and lower parts are parallel rectangles."

First, he repeated the title and Zhang Shou began to explain it. However, his explanation was actually a lot. Those who could understand his explanation at this time would definitely not be a layman in the science and a noun like a sci-child, which ordinary people could not understand, but those people would definitely understand.

However, he deliberately used the proper noun in "The New Edition of Ge's Mathematical Science" to replace Chutong. After a brief explanation, he began to write on the blank blackboard.

"Suppose the width of the top rectangle on the four-ring platform is x zhang, then the length is x + 3 zhang, the length of the bottom rectangle is x + 7 zhang, the width is x + 2 zhang, and the height of the observatory is x + 11 zhang. In this way, the volume of the four-ring platform is..."

Zhang Shou didn't even look at everyone's expressions, and continued to dance on his own:

"v={[2(x+7)+x+3](x+2)+x[x+7+2(x+3)]}(x+11)/6=[(3x+17)(x+2)+x(3x+13)](x+11)/6+17400..."

"Finally, the volume equation is derived..."

Zhang Shou directly marked the pattern of the Cubic power and came up with a one-yuan Cubic equation. He looked up at everyone and saw that the students of Jiuzhangtang were thinking. Lu Sanlang on the side was already dancing, and the emperor also tapped the table with one hand. Ye Mengqiu and the other who had just entered were frowning and puzzled, while others were thinking, so he smiled slightly and continued to write down.

It was naturally difficult for the ancients to solve a cubic equation, especially in an era without a symbolic system. It took a lot of time to calculate the results.

But for Zhang Shou, he directly used the general root-seeking formula of the Kardan formula without thinking.

When he wrote two blackboards with a bunch of formulas and finally came up with a result such as x=7 (the other two complex roots were directly abandoned by him), he heard a scream behind him.

"Is this the solution to Tianyuan Technique? It's so simple and intuitive..." Although Ye Mengqiu just shouted and the voice stopped abruptly, seeing that the three senior brothers suddenly looked at him, he still showed an annoyed but unwilling expression.

Zhang Shou glanced at the other party and saw that the large number of blackboards that Ah Liu moved in were still empty, he smiled and solved the remaining equations one by one. Then he solved the third question of the ancient arithmetic scripture, which also involved three 1-yuan cubital equations. This time, he used four blackboards. When it came to the fourth question, he simply omitted the steps to understand the problem and solved the three cubital equations casually.

It was not until this time that he dropped the white pen, then turned around and patted his hands gently, looking straight at the four uninvited guests who had come first but were devastated at this moment, and smiled faintly: "Do you understand now?"

"The classics and history of the young children who studied in the age of dynasty include the Three Character Classic and the Thousand Character Classic. But is the 99 Song also considered a basic math book? Throughout history, so many math masters have written works for people who have at least a foundation in math, but where does the so-called foundation come from? Meng Tong can learn the Thousand Character Classic of the Three Character Classic, but Meng Tong can learn the Nine Chapters of Arithmetic? Obviously, it cannot."

"However, if there are these simple and intuitive symbols, as long as you can recognize them all, you can learn from the simplest addition, subtraction, multiplication and division, from various simple graphics, and from simple applications of numbers."

Zhang Shou didn't know if the four people who came here today had read "The New Edition of Ge's Mathematical Science". He now listed the catalogue and talked about the gradual content and the knowledge points involved in the mathematical sciences - this is also what he had taken a break from his busy schedule over the past year. Of course, most of them were the credit of Ge's Mathematical Sciences, in order to lay the most solid foundation for the so-called Ge's Mathematical Sciences.

Sure enough, after he explained this, among the four people in front of him, Ye Mengqiu, a round-faced boy, lowered his head deeply, and the remaining three looked at each other, feeling embarrassed that he wanted to find a crack in the ground but had no place to drill.

Seeing this scene, Zhang Shoushao couldn't glance at the real protagonist of today's fat man: "Gao Yuan, today is your gift. If you have friends coming from afar, you must be responsible for entertaining the wine in the wine table. You should also give these guests a bowl of wine!"

"That's that's it!" As long as he gained the upper hand, Lu Sanlang didn't mind taking a humble attitude at all. Seeing him greeting four uninvited guests enthusiastically, he ordered his servants to add seats and tableware, and while he was dragging the person down, he called him down and sat down. Zhang Chen, who had just endured his sleepiness, breathed a sigh of relief with lingering fear.

He whispered to Zhu Er, who was also bluish on the side, "I feel that when Lu Sanpang was hanging with you and us, he was really hidden deep. I am an outstanding nobleman in my life. He is different from him. He may be like Wang Xiaotong, whom he just looked down upon, and wrote a book and said that he might be called a master of mathematics in the future!"

Zhu Er didn't know how to face Zhu Ying last night, so he stayed at the Lu family for a night. At that time, he had already seen Lu Sanpang's different lives now - just the stack of textbooks and exercises in the study, he felt his scalp numb after pursuing it.

When he heard Zhang Chen's words, he snorted softly: "If Lu Sanpang had that day, he deserved it. This kid did spend a lot of effort to study mathematics, otherwise he would not be the head of Jiuzhangtangzhai, nor could he be the attendant of the Eastern Palace... But when Lu Sanpang becomes a master of mathematics, my brother-in-law should become the master of mathematics first!"

At this moment, the huge place was a little messy. Not many people heard Zhu Er's words, but the emperor heard them with clever eyes and keenness.

He found that Zhu Er was not envious and jealous because his former friend was now powerful. He just used Zhang Shou to suppress Zhang Chen. After thinking for a moment, he waved to the bored Zhu Ying beside him. Seeing that the girl stood up and sat down without any scruples, he smiled and said, "Yingying, go and tell your second brother that I want to give him a task."

Zhu Ying was curious: "What mission? He is very sensitive now. He had shouted to me before, saying that as long as he is willing to spend his time, he will not be worse than Lu Sanlang!"

"That's right." The emperor smiled and then said lightly, "There is not only one way in this world, but most scholars can only take the path of studying, studying, practicing the imperial examinations, cultivating oneself, governing the country and pacifying the world. But your second brother has wealth and glory anyway. If he is really willing to spend his time, he might really have a day of his reputation in history in the future!"

If Zhu Ying changed his reputation in history to glorify his ancestors, he felt that Zhu Er was indeed very likely, but even famous officials from all dynasties might not be able to leave his name in history. Although Zhang Shou is at its peak now and is very popular, but a hundred years later, five hundred years later or even a thousand years later, maybe no one will remember his name. How could his second brother have such a great opportunity?

Zhu Ying was full of doubts, but when the emperor said something to her quietly, she was stunned.

After staring at the emperor for a long time, she couldn't help but say in a dull voice: "Uncle, are you sure that this is not a hollow glutinous rice dumpling? If my second brother really listened to your words and worked, it would not be a year or two, three or five years, or even ten or eight years. Don't look at his lack of character in his past, he is different from before!"

"I just saw that he was different from usual, so I asked him to do it. If it were your second brother's virtue in the past, I wouldn't mention it."

The emperor smiled and saw that Zhang Shou had returned to his seat and was chatting and laughing with the elderly who could at least be Zhang Shou's father or even grandfather. He sighed and said, "I used to think that those who were close to the red ones were red, and those who were close to the ink were black. This was a bit exaggerated, but now I believe it."

"The closer you get to Zhang Shou, the greater the impact you will be. Whether it is your second brother, Zhang Chen and Lu Zhu, Zhang Wu and Zhang Lu, or Sanlang Silang... everyone is changing on the better side. Not to mention the students in Jiuzhangtang, the positive academic style has not been seen in the Imperial College for a long time."

"From this point, Zhang Shou is indeed a good teacher."
Chapter completed!