The first question: a kind of rectangular floor tile is 24 cm long and 18 cm wide. How fast does it take to make a square floor with this kind of floor tile? The second question: a class of students do exercises, 10 people in a row, 8 people in a row are just finished, this class at least how many students? (please write quickly, I want to do the problem) How about a common multiple?

The first question: a kind of rectangular floor tile is 24 cm long and 18 cm wide. How fast does it take to make a square floor with this kind of floor tile? The second question: a class of students do exercises, 10 people in a row, 8 people in a row are just finished, this class at least how many students? (please write quickly, I want to do the problem) How about a common multiple?

1、12
2、40