Codeforces : Theatre Square Solution

 Codeforces : Theatre Square Solution


//Author: Humaun Kabir

#include<stdio.h>

#include<math.h>

int main()

{

    double n,m,a;

    double ans;

  

    while(scanf("%lf %lf %lf",&n,&m,&a)==3){

  

        double row = ceil(n/a);

        double column = ceil(m/a);

  

        ans =row * column;

  

        printf("%.0lf\n",ans);

  

    }

    return 0;

}

Problem Link :  http://codeforces.com/problemset/problem/1/A