Assignemnt 25 and A Dumb Calculator

Code

    /// Name: Xinting Chen
    /// Period: 5
    /// Program Name: A Dumb Calculator
    /// File Name: ADumbCalculator.java
    /// Date Finished: 10/6/2015
  
    import java.util.Scanner;
    
    public class ADumbCalculator
    {
        public static void main( String[] args )
        {
            Double firstnumber,secondnumber,thirdnumber;
            
            Scanner keyboard = new Scanner(System.in);
            
            System.out.print( "What is your first number?" );
            firstnumber = keyboard.nextDouble();
            System.out.print( "What is your second number?");
            secondnumber= keyboard.nextDouble();
            System.out.print( "What is your third number?");
            thirdnumber = keyboard.nextDouble();
            
            System.out.print( "(" + firstnumber +"+"+ secondnumber +"+"+ thirdnumber+") / 2 is..." + ((firstnumber+secondnumber+thirdnumber)/2) );
        }
    }
  		
    

Picture of the output