Calculator.java

class Calculator
{
   
    public int add(int a, int b){
        return a + b;
    }     
   
    public int multiplica(int a, int b){
        return a * b;
    }     
     
    public static void main(String[] args)
    {
        Calculator c = new Calculator();
        System.out.println(2 == c.add(1,1));
        System.out.println(6 == c.multiplica(2,3));
        System.out.println(9 == c.multiplica(3,3));
    }
}