#include <stdlib.h>
#include <iostream.h>
using namespace std;

int OGC(int c,int b,int a)
{
//     cout<"c="<<c <<endl;
//     cout<"b="<<c <<endl;
//     cout<"a="<<c <<endl;
 return 2*c*b*a   ;
    
}


//////Master
int main(){
    int n;
    int a,b,c,d,e;
    for(int i=0;i<2;i++){  //外層迴圈
    cout<<"the #1:";
    cin>>a;
    cout<<"the #2:";
    cin>>b;
    cout<<"the #3:";
    cin>>c;
    n= OGC(a,b,c) ;
    cout << "第"<<i+1<<"圈 n= " <<n<< endl;
    }
    
    system("Pause");
    return 0;

}