#include <iostream>

using namespace std;

int main()
{
int brx,brzx,bry,brzy,bxpod,bypod;
float x1,y1,z1;
cin>>x1>>y1>>z1;
int a,b;
int x=x1*100;
int y=y1*100;
int z=z1*100;
cout<<„unesi dimenzije plocica“<<endl;
cin>>a>>b;
if(x%a==0)
brx=x/a;
else
brx=x/a+1;
if(z%b==0)
brzx=z/b;
else
brzx=z/b+1;
if(y%a==0)
bry=y/a;
else
bry=bry/a+1;
if(z%b==0)
brzx=z/b;
else
brzx=z/b+1;
if(y%a==0)
bry=y/a;
else
bry=y/a+1;
if(z%b==0)
brzy=z/b;
else
brzy=z/b+1;
if(x%a==0)
bxpod=x/a;
else
bxpod=x/a+1;
if(y%b==0)
bypod=y/b;
else
bypod=y/b+1;
int brojplocica=(brx*brzx+bry*brzy)*2+bxpod*bypod;
cout<<brojplocica;
return 0;
}