#include<iosteram>
using namespace std;
int main()
{
    string vehicle;
    double distance,time;
    cin>>vehicle;
    cin>>distance;
    cin>>time;
    if((vehicle != "Car" && vehicle != "Bike")||(distance<1)||(time<1))
    {
        cout<<"Invalid input";
        return 0;
    }
    speed=distance/time;
    cout<<speed<<endl;
    return 0;
}