sicily 1051. Biker's Trip Odomete

#include <iostream>
#include<stdio.h>
#include<cmath>
using namespace std;
#define pi acos(-1.0)
int main()
{
    int n=1;
    double d,r,t;
    while(cin>>d>>r>>t,r)
    {
        printf("Trip #%d: %.2f %.2f\n",n++, r*d*pi/63360 , r*d*pi*3600/(63360*t) );
    }
    return 0;
}