func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     long long n, m, a, cnt = 0, tmp;     scanf( %lld%lld%lld , &n, &m, &a);     cnt = (m / a) * (n / a);     if (n % a != 0) cnt += (m / a);     if (m % a != 0) cnt += (n / a);     if (m % a != 0 && n % a != 0) cnt += 1;     printf( %lld n , cnt);     return 0;   }   