// Pizza.java   Simple program to compute gas mileage
// P. Conrad CISC370 06/07/2007



class Pizza {

    /**
     *  take price and diameter of a pizza, and compute
     *  price per square inch
     */

    public static void main (String args[])   {
	
	if (args.length!=2) {
	    System.out.println("Usage: Pizza price diameter");
	    System.exit(0);
	}

	double price = Double.parseDouble(args[0]);
	double radius = Double.parseDouble(args[1])/2.0;

	double area = Math.PI * Math.pow(radius,2.0);

	System.out.println("Price per square inch is " + (price/area));

    }

}