func_code_string: #include <bits/stdc++.h>   #pragma comment(linker,  /STACK:16777216 )   using namespace std;   int n, m, jm;   long long ans;   int main() {     cin >> n >> m >> jm;     ans = ceil(1.0 * n / jm) * ceil(1.0 * m / jm) * ((n - 1) % jm + 1) *           ((m - 1) % jm + 1);     cout << ans;     return 0;   }   