输入两个数，算他们两相乘与相除

import java.util.Scanner;


public class base {
    private int a,b;
    base(int a,int b){
        this.a = a;
        this.b = b;
    }

    public int getB() {
        return b;
    }
    public int getA() {
        return a;
    }

    public void calculate(){
        System.out.println(a * b);
    }
}
class Sub extends base{
    Sub(int a,int b){
        super(a,b);
    }
    public void calculate() {
        if(getB() == 0){
            System.out.println("Error");
        }
        else {
            System.out.println(getA() / getB());
        }
    }
}

class Test{
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        while (scan.hasNextInt()){
            int x = scan.nextInt();
            int y = scan.nextInt();
            Sub sub = new Sub(x,y);
            base base = new base(x,y);
            sub.calculate();
            base.calculate();
        }
    }
}