There is a kind of rectangular floor tile, its specification is 40cm * 30cm. At least how many such tiles can be used to make a square floor? It's better to write the process so that I can understand it. Thank you! It's a math problem. Don't post randomly!

There is a kind of rectangular floor tile, its specification is 40cm * 30cm. At least how many such tiles can be used to make a square floor? It's better to write the process so that I can understand it. Thank you! It's a math problem. Don't post randomly!

The problem is very simple. Do you know the least common multiple?
When 40 and 30 are reduced to no common divisor, they are 3 and 4, right
In order to form a square, it must be a common multiple of 3 and 4 to make the length and width equal. According to the formula of common multiple in mathematics, this number is the minimum number that can form a square, that is, 3x4 = 12 pieces to make the length and width equal