func_code_string: #include <bits/stdc++.h>   int sm(int a, int b) {     if (a % b == 0)       return b;     else       return a % b;   }   int main() {     int n, m, s;     scanf( %d%d%d , &n, &m, &s);     printf( %I64d , (long long)sm(n, s) * sm(m, s) * ((n - 1) / s + 1) *                         ((m - 1) / s + 1));   }   