08. Fish Tank

import java.util.Scanner;

public class P08FishTank {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        int lengthCm = Integer.parseInt(scanner.nextLine());
        int widthCm = Integer.parseInt(scanner.nextLine());
        int heightCm = Integer.parseInt(scanner.nextLine());
        double initPercent = Double.parseDouble(scanner.nextLine());

        double volumeCm = lengthCm * widthCm * heightCm;
        double volumeLt = volumeCm * 0.001;
        double percent = initPercent * 0.01;
        double result = volumeLt - (volumeLt * percent);

        System.out.printf("%.2f", result);
    }
}