HW2.4

 import java.util.Scanner;

 public class Solution
 {
     public static void main(String[] args)
     {
         final double POUND_TO_KILOGRAM = 0.454;

         Scanner input = new Scanner(System.in);

         System.out.print("Enter a number in pounds: ");
         double pounds = input.nextDouble();
         double kilogram = pounds * POUND_TO_KILOGRAM;

         System.out.println(pounds + " pounds is " + kilogram + " kilograms");

         input.close();
     }
 }