using System;

public class Program {
    public static void Main() {
        long price = long.Parse(Console.ReadLine()) * 108;
        string priceStr = price.ToString();
        for (int i = 0; i < priceStr.Length; i++) {
            if (i == priceStr.Length-2) {
                Console.Write(".");
            }
            Console.Write(priceStr[i]);
        }
        Console.WriteLine();
    }
}