#include<iostream>
using namespace std;

int main()
{
    int L,W
    try{
        if(!(cin>>L>>W))return 0;
        
        if(L<=0||W<=0){
            throw"Invalid Input";
        }
        cout<<L*W<<endl;
    }
    catch(...){
        cout<<"Invalid Input"<<endl;
    }
    return 0;
}