/*
TASK:crossing
LANG:C++
*/
#include<iostream>
using namespace std;
int main()
{double w,s,a,b;
  int t,m,n,c;
  cin>>w>>s>>a>>b;
  t=a*b/20;
  m=w*s;
  n=w*a*s;
  cout<<t<<":"<<m<<":"<<n<<endl;
    system("pause");
    return 0;
}

    
