ProgBasicsExam3and4November2018-E01weddingHall

import java.util.Scanner;

public class E01weddingHall {

        public static void main (String[]args) {
            Scanner scanner = new Scanner(System.in);
            double length = Double.parseDouble(scanner.nextLine());
            double width = Double.parseDouble(scanner.nextLine());
            double sideBar = Double.parseDouble(scanner.nextLine());


            double Room = length * width;
            double Bar = sideBar * sideBar;
            double Dancing = Room * 0.19;
            double SpaceAvailable = (Room - Bar - Dancing) / 3.2;



            System.out.printf("%.0f", Math.ceil(SpaceAvailable));

        }
}