Code

   
    /// Name: Afaf Nabeeha
    /// Period: 7
    /// Program Name: A Dumb Calculator
    /// File Name: Dumb.java
    /// Date Finished: 10/2/2015 public class Dumb

        
        import java.util.Scanner;
            public class Dumb
            {
                public static void main( String[] args )
                {
                    double n1, n2, n3;
        
                    Scanner keyboard = new Scanner(System.in);
        
                    System.out.print( "What is your first number? ");
                    n1 = keyboard.nextDouble();
        
                    System.out.print( "What is your second number? ");
                    n2 = keyboard.nextDouble();
        
                    System.out.print( "What is your third number? ");
                    n3 = keyboard.nextDouble();
        
                    System.out.println( "  " );
        
                    System.out.print( "( " + n1 + " + " + n2 + " + " + n3 + " ) / 2 is..." );
        
                    System.out.println( (n1 + n2 + n3 ) );
        
                }
                
            }
            
            
    
Picture of the output