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