Dance Hall

package com.company;

import java.util.Scanner;

public class DanceHall {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        // hall dimensions
        double hallLengthInMeters = Double.parseDouble(scanner.nextLine());
        double hallWidthInMeters = Double.parseDouble(scanner.nextLine());
        double wardrobeSideInMeters = Double.parseDouble(scanner.nextLine());

        double hallArea = (hallLengthInMeters * hallWidthInMeters) * 10000;
        double wardrobeArea = (wardrobeSideInMeters * wardrobeSideInMeters) * 10000;

        double benchArea = hallArea / 10;
        double hallFreeArea = hallArea - wardrobeArea - benchArea;

        double dancersSpace = 40 + 7000;
        int dancersCount = (int)Math.floor(hallFreeArea / dancersSpace);
        System.out.println(dancersCount);




    }
}