Dumb Calculator

import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner input = new Scanner (System.in);

        System.out.print("What is your first number? ");
        Double num1 = input.nextDouble();

        System.out.print("What is your second number? ");
        Double num2 = input.nextDouble();

        System.out.print("What is your third number? ");
        Double num3 = input.nextDouble();

        double num4 = (num1 + num2 + num3) / 2;
        System.out.println("( " + num1 + " + " + num2 + " + " + num3 + " ) / 2 is ..." + num4);
    }
}