using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Yuki
{
    class Program
    {
        static void Main(string[] args)
        {
            decimal d = decimal.Parse( Console.ReadLine());
            d = d * 1.08m;

            Console.WriteLine(d);
        }
    }
}