#include<iostream>
using namespace std;
int main(){
    string vehicle;
    double distance,time;
    cin>>vehicle>>distance>>time;
    if(vehicle !="Car" && vehicle !="Bike")||distance <=0 || distance >1000 || time<=0)
    {
        cout<<"Invalid input";
    }
    else {
        double speed +distance /time;
        cout<<speed;
    }
    return 0;
}