Without waiting for the guy to speak, Ting Fang said: "I know the prince of Dingguo, please talk to him, can you lend it to me?" ”

The man was embarrassed and said: "The small one is not easy to say, the prince has been scheduled for a long time, and it is only because there are too many books that it is difficult to move, so it has been delayed until today." I made an appointment to catch the car in two days to carry it. "Slander in my heart: Miss, you don't look at how many books you occupy, such a precious thing, you say to borrow it, the prince knows it, and we won't do anything. A whole cart of books, what a big list, even the owner stared at it tightly, if it weren't for the young lady of Ye Ge's hometown, it would not be easy for ordinary people to see it. Just go and spread the word casually, catch up with the prince of the world and be in a bad mood, whether he wants to mix up!

"He can't see so many at a glance." Ting Fang smiled, "I don't want him, but I borrow a few copies and go back to copy them." You see that there are only a few people I have brought, so please go and report it. Xu Jingchang can't finish watching it, and she can't finish watching it. Since they are acquaintances, they can borrow it. I think that the handsome senior brother who came to their house will not be stingy. It's really not good, she spends money to rent the head office, right?

The guy was still hesitating, and said with a reluctant smile: "Miss, don't be embarrassed, this matter is really uncontrollable." ”

Ting Fangqi said: "It's just a vain question, if I don't move out immediately, what's the difficulty?" ”

The guy said: "Xiao's identity is humble, and he doesn't dare to go to the nobleman to talk back at will." If the lady really wants to borrow it, please ask the lady to write a note or make a personal message. We can't get close to the nobles. ”

Ting Fang had no intention of making things difficult for the guy, and said with a smile: "Yes, I didn't think about it thoroughly." It's just that I didn't bring many people today, I'm a girl's family, and it's even harder to scribble. The prince of Dingguo is my uncle's student, and you don't coax me, he buys so many books, you can't get close to him, there are always people who can get close. You only said that it was the fourth girl from Ye Ge's hometown, and he knew it. "Even if you don't know, you can guess. He also instructed, "I borrowed my house to take a look." Return him in a few days. ”

The powerful families in the capital have more contact with relatives, and it is common for the official lady to know a prince, maybe it is still a close relative such as an aunt and cousin, although the young lady in front of her is young, she is articulate and understandable, and it is inconvenient to offend if she wants to be a powerful person. and he will send a message to him, and it will be irrelevant to him whether he agrees or not. So he went outside and called a little servant, and after saying so, the little guy ran away.

Ting Fang hurried to scan the book. This dynasty does not appear in the history books, but the previous dynasty is clearly recorded as the Ming Dynasty. The turning point in history began at the end of the Ming Dynasty, when the newly established dynasty repelled the Qing soldiers and sat on its own. If this dynasty □□ not worn, it is a parallel world. Since the time is equivalent to the Qing Dynasty as she knew it, many of the technologies in Europe have already taken shape. Although there were many corrections to the geometric algebra of this time, these were the basis of mathematics, and some methods were clumsy in the eyes of modern people, but they were extremely valuable ideas. It was too convenient in the previous life, and there were many formulas that I hadn't carefully brushed up. In this life, as a young lady, she is still destined to have no way to make a living, and she just has time to deduce slowly. Add a touch of color to the life of hard work.

Tingfang reads books quickly, she doesn't ask for content, she just browses. Some people who are too shallow will throw away their hands, and those who find it interesting will secretly write down their names. An hour passed, and the table was stacked with stacks of books she had scavenged. Elementary mathematics is put aside, the difficult ones are placed in the middle, and there are a lot of mechanical ones next to them. Ting Fang thought to herself: It turns out that the senior brother is an engineering monk, no wonder the liberal arts are so miserable, too normal! It's a pity that the ancient liberal arts were important, and if they were to be put on hold in the future, his father would not be worried like that, but would show off his son's good grades when he met people.

Mother Hu doesn't understand the academic things, but she has been in the scholarly family all her life, and she knows that from the Chen family to the Ye family, anyone who takes a fancy to the master of a certain book will basically go crazy for a long time. Ting Fang's behavior she didn't even bother to raise her eyebrows, she asked her guys to move tricks, took the girls to gestur, and commanded the girls to draw a few from time to time. The staff of Chongshu Office is very thoughtful, and the pen, ink, paper, and inkstone are copied casually, and they ask with a smile: "We are a bookstore, which is very convenient." Mom, why don't you pick it out, and we can make a booklet with you, how about it? ”

Hu's mother happily picked it up. Ting Fang said depressedly: "Then why don't you rip a few copies of the books I want?" ”

The guy smiled: "So that the young lady knows that the books in your hands are all in Fanbang characters, and none of us recognize them, so it is easy to copy them wrong." If you want to rip, we know a lot of readers who copy books for a living and can copy for you, but we don't dare to accept it. What if you make a mistake, isn't it a smashing sign? ”

Some of the content Tingfang really wanted to collect, so he said: "Then you find a few copies for me, you don't need to copy the Fanbang characters, just copy the number symbol pattern." "Anyway, she can't understand the ghost drawing, and she can't copy it in vain.

The guy hurriedly said: "Miss picked up a few books she wanted, made a list, and the small ones were copied by someone else, and then sent them to the house." ”

Ting Fang was still scanning the book, and he couldn't make up his mind, so he said first: "You wrap the "Geometric Original" for me." If you don't have a translator, you have to do it. ”

The guy was happy in his heart, the "Geometric Original" has a total of fifteen volumes, and because it is a manuscript, it is extremely rare, even in the eyes of the guys in the bookstore, it is an outrageous price. Ordinary printed books are only two or three hundred texts, this stunned is a price of one or two silver, there are only a few sets in the library, and they can't be sold for many years. Now the little girl bought the whole set in one go, and her eyes narrowed into a slit as she counted her head.

As he was talking, the door was knocked a few times, only to hear the outside say: "In the Dingguo Mansion Xu Jingchang, is the fourth sister of the Ye family inside?" ”

Mother Hu stood up and said, "Is there something wrong with Gongzi Xu?" ”

Ting Fang lowered her voice and said to Mother Hu: "Second uncle's students, don't be nervous. ”

Mother Hu's voice was lower: "The second master has to accept the squirt, so he is not a serious student." "If it's a serious one, it's my brother and sister, and there's nothing wrong with living in the same room. But what is the ......

Ting Fang pointed to the book on the table: "I have a request for him......"

Mother Hu: "......"

Xu Jingchang stood outside the door for a long time, there was no movement inside, and he was about to ask again, when the door suddenly opened, and a mother in her forties came out. When I looked at it again, a teenage girl was standing behind her mother, who was the one I had seen in Yefu Garden in the first month. Ting Fang saluted dignifiedly: "I've seen Senior Brother." ”

Xu Jingchang was full of joy and was pricked by a basin of cold water, and his voice was wilted: "Hello fourth sister, do you like Western books?" But he said in his heart, what kind of moth is this naughty girl? I harmed the plum blossoms last time, but this time I didn't want to harm the book I finally got back, right?

Ting Fang saw that Xu Jingchang's face was full of vigilance, and she knew it in her heart. As a person who only fought with the bear child a few days ago, I understand Xu Jingchang's mentality very well. Mathematics is a discipline that is against the sky, not to mention ancient China, in the 21st century compulsory education compulsory education compulsory cramming method of primary schools, there are not a few dead and alive students who are tortured by the four operations. She is a fourth-grade child who reads geometry books, and normal people don't believe it. It's a pity that she is indeed not a normal person, so she opened her mouth and said: "I love arithmetic the most, and I want to ask my senior brother to borrow a book." ”

Xu Jingchang originally thought that he had a confidant, so he came in a hurry, but he didn't expect to meet a bean ding, and said that he loved arithmetic. Can you make a draft first? Chongshu Bookstore's "Geometric Original" has been placed for several years and no one cares, you always rush up and go directly to the Western original, believe you is strange!

Ting Fang made up her mind in Xu Jingchang's increasingly suspicious eyes, she must win the trust of others, otherwise let alone borrow it and copy it, she will not be able to read it immediately. No one would let a precious book be a curse for a bear child - she was too young. His eyes swept the table, but he still picked up the translated "Geometric Originals", casually flipped to a certain page and looked at it, before he smiled and said, "Senior brother, do you know how many solutions there are to this problem?" ”

Xu Jingchang glanced at it and knew which question she was pointing to, and was stunned: "How many solutions?" ”

Ting Fang smiled very sweetly, and picked up the pen that Mother Hu had drawn and began to list formulas. True. In elementary school mathematics, people who have done calculus can naturally have five, six, seven or eight solutions that either change the soup or change the medicine or change the soup without changing the medicine. Ting Fang wrote quickly, and after a while, even the picture and formula were densely written on a piece of paper, and then handed it to Xu Jingchang: "How?" ”

It's a pity that the self-taught Xu Jingchang can barely understand and almost vomits to death. So the lovely student Xu came up with a question on the spot, and the extremely old-fashioned chickens and rabbits were in the same cage, trying to understand Tingfang's real mathematical level with this question. Ting Fang almost used the whistle on Weibo to command the chicken rabbit to tease classmate Xu, but she remembered to borrow books, so as not to leave an improper impression, so she pretended to be serious: "It's easy, binary equations can be solved." ”

Xu Jingchang two-eyed mosquito coil: "What is a binary equation?" ”

Tingfang happily replaced XY with A and B, wrote the formula, analyzed and explained, and came up with a similar type of problem. Xu Jingchang took the question and filled it into the formula, and calculated the answer almost in seconds, and was immediately stunned by Ting Fang! Chickens and rabbits in the same cage are very classic, almost everyone who likes arithmetic will do it, he took it out but tried Tingfang, I never thought that she would solve it so easily, and she was very skilled.

Ting Fang made a victory gesture in her heart, and smiled sweetly: "Senior brother, can you lend me these books to see?" ”

Xu Jingchang came back to his senses and asked, "Have you read the Nine Chapters of the Book of Numbers?" It's called equations there, but now it's called Tianyuan. ”

As a science monk, Tingfang's history must only be at the level of the entrance examination. When I was in college, I forgot the history of mathematics and asked, "What is the Nine Chapters of the Book of Numbers?" ”

Xu Jingchang was dumbfounded: "You haven't heard of it?" So how did you come up with it? ”