#include<iostream>
#inclue<iomanip>
using namespace std;
int main()
{
    string vehicle;
    double distance,time,speed;
    cin>>vehicle;
    cin>>distance;
    cin>>time;
    if((vehicle !="Car"&&vehicle !="Bike")||distance<=0||time<=0)
    {
        cout<<"Invalid Input";
        
    }
    else
    {
        speed = distance/time;
        cout<<fixed<<setprecision(2)<<speed;
    }return 0;
}