Each room has the same shape, an equilateral square. The rooms on the 2nd floor also have the same area, because they are the same. But there was one room that was different from the others, and that was the room that was used as a library.
"Um..."
I thought for a moment as I stared at the books and all the things that were there burning in the fire. After a while, Alice asked in confusion.
"What's wrong?"
"I was wondering..."
"Wonder about what? Is something bothering you? Can't you stand fire? You're so weak."
"No, that's not it. It is just..."
"Mhm?" She tilted her head and looked at me in confusion.
"One, two, three… and even seven rooms on this floor have the same area, right?"
"Yes, it is true. So what?"
"Why does only this room has a rectangular shape? Why is the room bigger than the other rooms?"
