Birthday

import java.util.Scanner;

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

        int length = Integer.parseInt(scanner.nextLine());
        int width = Integer.parseInt(scanner.nextLine());
        int height = Integer.parseInt(scanner.nextLine());
        double percent = Double.parseDouble(scanner.nextLine());

        int volume = length * width * height;
        double litersDefault = volume * 0.001;
        double percent1 = percent * 0.01;
        double litersNeeded = litersDefault * (1 - percent1);

        System.out.printf("%.3f", litersNeeded);
    }
}