poj 1665（水题，简单计算）

#include<iostream>
#include<cstdio>
using namespace std;
#define PI 3.1415927
int main(){
    double d,r,t,ansl,ansspd;
    int kase = 1;
    while(scanf("%lf%lf%lf",&d,&r,&t)==3&&r!=0){
        ansl = PI*d*r/12/5280;
        ansspd = ansl/(t/3600);
        printf("Trip #%d: %.2lf %.2lf\n",kase++,ansl,ansspd);
    }
    return 0;
}