#include<iostream>
using namespace std;
class A
{
    public:
    void cal(double dist,double time)
    {
        cout<<dist*time;
    }
}
int main()
{
    string name;
    double dist,time;
    cin>>name>>dist>>time;
    A obj;
    if((name=="Car"||name=="Bike")&&dist>=0&&time>=0)
    {
       obj.cal(dist,time); 
    }
}