Keyboard Input #25 (One word... "Algebra" and PEMDAS)

Code

    /// Name: Amir Salehi
    /// Period: 7
    /// Program name:  ADumbCalculator
    /// File name:  ADumbCalculator.java
    /// Date: Finished 10/2/2015
 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 second number? ");
          thirdNumber = keyboard.nextDouble();
         
         System.out.println( "( " + firstNumber + " + " + secondNumber + " + " + thirdNumber + ")" + " " + "/" + " " + "2 is..." + ((firstNumber + secondNumber + thirdNumber) / 2  ));
         
         
        
     }
 }
    

Picture of the output