#include<iostream>
using namespace std;

int main() {
    int length, width;
    
    if(!(cin>>length>>width)) {
        cout << "Invalid Input"
        return 0;
    }
    
    if(length<=0 || width <=0) {
        cout << "Invalid Input";
        return 0;
    }
    else{
        cout << length *width;
    }
    
    return 0;
}