using System;

namespace ConsoleApp1
{
    class Program
    {
        public static void Main()
        {

            int workdays = int.Parse(Console.ReadLine());
            double salaryDay = double.Parse(Console.ReadLine());
            double exchangeRate = double.Parse(Console.ReadLine());
            double zaplata = workdays * salaryDay;
            double godDohod = (zaplata * 12) + (zaplata * 2.5);
            double danuk = (godDohod * 25) / 100;
            double chistGodDohod = (godDohod - danuk) * exchangeRate;
            double srednaPechalbaDen = chistGodDohod / 365;
            Console.WriteLine($"{srednaPechalbaDen:f2}");


        }

    }
}