using System;

namespace firma
{
    class Program
    {
        static void Main(string[] args)
        {
            int workDaysInMonth = int.Parse(Console.ReadLine());
            double daySalary = double.Parse(Console.ReadLine());
            double usdToLev = double.Parse(Console.ReadLine());

            double monthSalary = workDaysInMonth * daySalary;
            double yearSalary = monthSalary * 12 + monthSalary * 2.5;
            double taxes = yearSalary * 0.25;
            double netProfit = yearSalary - taxes ;
            double avgProfitPerDay = netProfit * usdToLev / 365;

            Console.WriteLine("{0:F2}", avgProfitPerDay);
        }
    }
}