// Reading floating point numbers using the Keyboard
// class from the book.

import cs1.Keyboard;

class Yard3 {

   final static float YardsToMeters = 0.8f;  

   public static void main (String[] args) {

     System.out.print ("Enter the width of the yard: ");
     System.out.flush();
     float yardWidth = Keyboard.readFloat();

     System.out.print ("Enter the length of the yard: ");
     System.out.flush();
     float yardLength = Keyboard.readFloat();     

     System.out.print ("Enter the width of the house: ");
     System.out.flush();
     float houseWidth = Keyboard.readFloat();

     System.out.print ("Enter the length of the house: ");
     System.out.flush();
     float houseLength = Keyboard.readFloat();

     float yardArea = yardWidth * yardLength;
     float houseArea = houseWidth * houseLength;
     float grassArea = yardArea - houseArea;
     float grassAreaInSqM = grassArea * YardsToMeters;
     float timeInSec = grassAreaInSqM / 2;
     float timeInMin = timeInSec / 60;

     System.out.println ("The time to cut the grass is " + timeInMin + " minutes.");
   }
}