McGonagall nodded, asked for a pen and paper, drew a complete table of ninety-nine multiplication formulas, and for a more detailed explanation, wrote the multiplication terms upside down, and explained the decimal algorithm in detail.

The Nolan continent now uses the hexadecimal system, and there are more than 1,700 multiplication tables, if it involves multiplication and division of more than two digits, the calculation will become extremely complicated, and if you can do more than three digit division operations, you can be regarded as a mathematician.

History has proved that the decimal system invented by the Chinese sages is the simplest and most universal decimal method, and the ninety-nine multiplication table is enough to solve most mathematical problems in life, which is an era when the ancient Chinese crushed the world in arithmetic.

Luna watched from the side, her eyes became brighter and brighter, and her mouth opened wider and wider, as an arithmetic teacher, and grew up in an arithmetic family, her eyesight was naturally not comparable to Amy.

Although she still doesn't have a good understanding of the concept of decimal in some aspects, McGonagall's explanation is simple enough for her to see that this algorithm is good, and when combined with the highly regular multiplication formula, she sees infinite possibilities.

"Mr. McGonagall, although I am not sure whether your algorithm and decimal method are really universal in all cases, it is undeniable that you must be a genius." Luna looked at McGonagall as she put down her pen and said seriously.

"I'm not a genius, I just know a little bit better." McGonagall smiled and shook her head, these were the wisdom of the sages, for this world, it was a hedge from top to bottom, and he was not sure what kind of impact this piece of paper would have on this world.

"I will send this information to Luodu as soon as possible, with my ability is not enough to evaluate its value, and I can't fully verify it, but I can be sure that this can definitely cause an uproar in the arithmetic world of the Nolan continent, and the word Maimi will not be buried." Luna felt more and more that McGonagall was humble and polite, not only was the food so delicious, but she was also a genius in arithmetic, and even such a discovery had to be added to Amy's name, which could be said to spoil her daughter to the extreme.

This man is really interesting and curious, what is there that he won't?

Amy looked at McGonagall with bright eyes, and even Teacher Luna said that her father was a genius, and that her father was really good.

McGonagall smiled and nodded, anyway, there should be no concept of manuscript fees and invention patents in this world, and he didn't think about making money from this, so he should advertise the restaurant too much.

Of course,The purpose of coming to the school park today is not to teach the multiplication table.,The main thing is to find a magic teacher for Amy.,So get down to business: "Miss Luna,I'm bringing Xiaomi over today.,In addition to Xiaomi wanting to come to see you.,I also want to consult.,The magic teacher of the Chaos School Park,Will you accept paid private teaching?,Amy is very interested in magic.,But she hasn't reached the school age yet.,So I want to find a teacher for her in advance to teach her some basic magic knowledge.。 ”

"I'm afraid this won't work.,Teachers who teach in the chaotic school park can't teach for a fee in the outside world.,Once found by the school park,,Will be disqualified as a teacher.。 Luna shook her head a little embarrassed, looked at Amy and said, "And Amy will indeed not officially enter the kindergarten until next year, even after entering the kindergarten, she will have to wait until she grows up to have the opportunity to come into contact with magic knowledge, and after the professional magic teachers in the school confirm that she has a magical talent, she will be specially gathered for teaching." ”

Unexpectedly, because Amy wanted to learn magic, McGonagall also came to find a private tutor herself.

"Well, well, thank you Miss Luna for your doubts." McGonagall was a little disappointed when she heard this, but this is a system regulation, so there is no way, the original plan has failed, and it seems that she still has to think of other ways.

"Actually, Amy is still young, so there's no need to rush to learn magic, it's quite boring." Luna said as she looked at Amy and smiled.

"Luna-sensei, I like magic a lot, I think it's super fun." Amy said, shaking her head.

McGonagall took Amy to Luna's office for a while before leaving, and as she walked out of the school gates, the old janitor and the orc were wide-eyed, not knowing when they had entered.

"It should be delivered to my grandfather as soon as possible, maybe this will be an important turning point in the large-scale promotion of arithmetic, and my grandfather will definitely be interested in him." At the office window, Luna looked at McGonagall's back, her face couldn't hide her excitement, and she walked quickly to the table to pick up the two pieces of paper, put them in her arms, and walked out.

"Father, shall we go home now?" Amy took one of McGonagall's fingers, looked up at McGonagall and asked, she was in a good mood today, her singing was liked and praised by everyone, and she also used the multiplication table taught by her father to compare Palmer, and felt that she was no worse than them at all.

"No, since you're out, let's have a good day, and I'll have lunch outside." McGonagall shook her head, it was a bit boring to stay in the restaurant every day, and now it was time for the meal, so she took Amy to a lively barbecue restaurant on the side of the road, and today she came to taste how the dishes of the popular restaurant in another world are doing.

The ugly duckling sleeping in the basket was covered with a towel by McGonagall, and no one knew what was in the basket without saying a word.

As soon as she entered, the smell of roast meat came to her face, but McGonagall couldn't help but frown, the smell had a hint of mutton, and the spicy taste was too pungent, a taste stronger than pepper.

"Father, are we going to have a barbecue?" Amy's eyes were shining, and she had never eaten barbecue.

"Yes." McGonagall, who was a little hesitant to leave, nodded when she saw that Amy was looking forward to it, and chose a place where no one was by the window and sat down.

This barbecue restaurant is considered a popular barbecue restaurant in Aden Square, only less popular than Fryer Tavern, and you usually have to queue up to eat his barbecue at night, even at noon, the lobby with more than 20 tables is almost full.

McGonagall glanced at the plate in front of the guest next to her, the lamb was cut into pieces, the color was dark, and the surface was coated with a layer of blackened sauce and seasoning powder, and the two guests each ate the beef on their plates, talking and laughing, eating quite happily, and seemed quite satisfied with the food.

"The sauce is not evenly brushed at all, the seasoning powder is put at the wrong time, the charcoal temperature is too high, and the roasting time is too long. With just one glance, McGonagall was already starting to feel a little impatient to complain.

"Whew...... Hold back and smile, now that you are also a restaurant owner, if you complain and are recognized, I am afraid that you will be regarded as a smashing field. McGonagall calmed down, then opened the menu and ordered two servings of the restaurant's signature roast lamb and specialty roast beef, one for 88 copper coins, which was the most expensive on the menu.

"No wonder they look like this when they see my menu." McGonagall raised her eyebrows and put down the menu in her hand, the cheapest children's barbecue set was only 20 copper coins, which was not enough for him to buy an egg.