After dividing by int data, the answer is still int.

Take n = 4 and I = 3 as an example.

m =(double)(n/I)=(double)(4/3)=(double) 1 = 1，

To judge whether m divided by n is divisible, you can use m%n == 0 or n%m == 0, where m%n represents the remainder of m divided by n, and the remainder is divisible if it is 0.