Saying goodbye to the children, McGonagall and Luna walk side by side in the setting sun in the Plaza de Aden, Amy and the Ugly Duckling playing hide-and-seek in front of them, and the laughter of silver bells echoes through the square.

Luna and McGonagall said that the decimal system and the ninety-nine multiplication table caused a sensation and heated discussion in the Los Angeles mathematical community, and the mathematicians of the Los Empire are verifying the feasibility, because this decimal algorithm was used once when the continental currency was unified, and it is the result of the collision of different mathematical civilizations of mathematicians of various races.

However, in addition to the application of currency, the Los Empire still maintains its own tradition of hexadecimal arithmetic, just as the elven arithmetic still uses the decimal system.

Although the decimal system was brainstormed by mathematicians across the continent at that time, it has not been paid attention to and extended exploration, and in their opinion, the decimal algorithm is more cumbersome and difficult to understand, and even has to be reconverted to sexagesimal before calculation.

It can be said that those mathematicians have fallen into the so-called traditional constraints and strange circles, and never thought of starting with the decimal system, which has led to the fact that this most advanced and simple algorithm is still only used in the monetary system after decades of existence.

McGonagall's 99 multiplication formula table can quickly calculate single-digit multiplication, and even children can easily use it as long as they are proficient in memorization.

This subversive algorithm and discovery is undoubtedly an earthquake for the entire mathematical community, and the simple arrangement includes the multiplication of all single digits, which is enough to solve all the multiplication problems of single digits, and is enough to easily deal with many problems about money in life.

If it can be extended to tens and hundreds, the speed and efficiency of the operation will definitely far exceed that of other decimal systems, and even provide the possibility of three-digit multiplication, which is almost impossible to achieve in the sexagesimmetry, even the old man Field can only do the simplest three-digit multiplication.

Therefore, during this time, the mathematicians of the Los Empire gathered in Luodu to discuss this issue, and there were several large-scale debates on whether to abandon the sexagesimal system and comprehensively reform it into a decimal system.

The reformists saw an infinite future in the decimal system, while the old-fashioned school believed that the decimal system was nothing more than a false proposition that had not been verified, and that it had been unstudied for decades that it was all incomprehensible.

McGonagall couldn't help but smile as she listened to Luna's description, but she didn't expect that a multiplication formula table he casually threw out would cause such a sensation in the world.

"Mr. McGonagall, I would have liked to visit you today, and my grandfather was on the side of the reformers about the reform of the decimal system and the verification and promotion of multiplication formulas, so he would like to ask you to go to Los Angeles and explain to you the origin and feasibility of these things." Luna paused and looked at McGonagall seriously.

"It probably won't work, math is just a hobby for me, and I can't leave the restaurant and run to Lodu to teach them the multiplication formula." McGonagall smiled and shook her head, looking at the peace sculpture in the middle of the square in the distance, where two white doves landed on an olive branch and said indifferently, "It is a mission for me to bring wonderful food experiences to our guests. ”

Luna looked at McGonagall's side face, the golden afterglow sprinkled on his body, like a faint layer of golden sand, yes, this is a genius mathematician, but even more a genius chef, compared to arithmetic, it is a pity that there is such a chef in this world, and she is a little embarrassed to say, "Sorry Mr. McGonagall, for making such an unreasonable request to you." ”

"It's okay, Miss Luna's grandfather was a great educator who worked to popularize arithmetic, and he can always ask me if he needs anything." McGonagall smiled and shook her head, not that he was pretending, but if he left the restaurant and ran to Luodu, the system would probably go crazy.

Moreover, it was not easy to get from Luodu to the City of Chaos, and he didn't want to go back there so soon, standing in the middle of the vortex again, and the ghost knew if he would fall.

In such cases, correspondence is naturally the best option.

"Thank you, I'll pass you on to him." Luna smiled again, and although McGonagall didn't want to go to Lotus, it would be good news if he was willing to continue to provide his thoughts and ideas.

The two continued to walk for a while, and McGonagall thought that Luna would ask a little about the children's assistance, but she didn't say a word about it the whole time, which also increased his favorability a lot.

This girl is as clean as the white silk scarf on her shoulder, and she can do good deeds herself, but she will not ask others to do the same.

As it gets dark, Luna says goodbye to the two of them and goes back first, and McGonagall also walks in the direction of the house with Amy, and when she walks to the center of the square, she sees a row of four-meter-high magic crystal walls standing on the side near the street, and several magicians are directing the workers to debug and install.

"Starting tomorrow, it's war." McGonagall looked at those crystal walls, and there was a little expectation in her eyes, these should be the preparations for the battle for the food ranking of Aden Square starting tomorrow, this kind of thing, if you don't do it, forget it, since you want to do it, of course, I hope to get closer to the front.

Back at the restaurant, there were still a few customers at the door who were reading the notice, and when they saw McGonagall coming back with Amy, they hurriedly came forward with some concern and asked, "Boss Mai, I heard that the restaurant was smashed, are you okay?" ”

"It's okay, the thugs have been captured by the Gray Temple, it's just that the restaurant has been damaged a little, but it won't affect tomorrow's business." Feeling the care of these guests, McGonagall was also a little moved in her heart, and shook her head with a smile.

"yes, the bad guys were burned by Amy's fireball!" Amy nodded.

"The little boss is the best." Everyone laughed, and McGonagall and Amy were fine.

"Boss Mai, you see that we haven't eaten so late, why don't you make us something to eat? If the new product is ready, why don't you ......" A bald man on the side looked at McGonagall with a smile, and although the words behind him were not spoken, they were already self-evident.

"I'm sorry, this kind of thing happened today, my young heart has been greatly hurt, I need to take a calm rest, so I need to take a break today, calm down, everyone, please go back, tomorrow will be open as usual, new dishes will be served." McGonagall calmly refused, and took Amy into the dining room.

"This ......" the guests looked at each other as they looked at the closed door.

"Forget it, at this time, let's be considerate of Boss Mai, I just heard that when there was an accident at noon, there was a big explosion in the restaurant, and a group of dozens of thugs surrounded the restaurant, all kinds of smashing, = the Gray Temple sent a large army to suppress it." A little old man on the side said, and turned around and left.

"So horrible? Forget it, look forward to tomorrow's new dishes, and come early to line up. ”

Then the crowd dispersed.