#include<iostream>
using namespace std;
void cxalculateTotalCost(intt numberOfGuests, int costPerGuest)
{
    if(numberOfGuests<=0)
    {
        cout<<"Invalid input"<<endl;
    }
    else
    {
        cout<<numberOfGuest*costPerGuest<<endl;
    }
}
int main()
{
    int guests,cost;
    cin>>guests>>cost;
    calculateTotalCost(guests,cost);
    return 0;
}