What will be the output when the following Java program is executed?

What will be the output when the following Java program is executed?

class Calculator {
  int multiply(int a, int b) { return a * b; }
  double multiply(double a, double b) { return a * b; }
}
public class Test {
  public static void main(String[] args) {
    Calculator calc = new Calculator();
    System.out.println(calc.multiply(4, 5));
    System.out.println(calc.multiply(3.0, 2));
  }
}