#include <iostream>
using namespace std;
class Base {
private:
int x;
int y;
public:
Base(int x, int y) {
this->x = x;
this->y = y;
}
int getX() {
return x;
}
int getY() {
return y;
}
void calculate() {
cout << getX() * getY() << endl;
}
};
class Sub : public Base {
// write your code here......
public:
Sub(int x,int y):Base(x,y){
}
void calculate(){
if(getY()==0){
cout<<"Error"<<endl;
return;
}
cout<<getX()/getY()<<endl;
}
};
int main() {
int x, y, z;
cin >> x;
cin >> y;
Sub sub(x, y);
sub.calculate();
return 0;
}