package com.company;

            ;
            import java.util.Scanner;

    public class Main {

        public static void main(String[] args) {
            try (Scanner scanner = new Scanner(System.in))
            {
                double usd = Double.parseDouble(scanner.nextLine());
                double bgn = usd*1.79549;
                System.out.printf("%.2f",bgn);

            }
        }
    }