using System;

namespace exerricsee
{
    class Program
    {
        static void Main(string[] args)
        {

            double months = int.Parse(Console.ReadLine());
            double percent = int.Parse(Console.ReadLine());
            double rent = double.Parse(Console.ReadLine());

            double firstPeriod = months / 2;
            double secondPeriod = months - firstPeriod;

            double firstPeriodPrice = firstPeriod * rent;
            double secondPeriodPrice = secondPeriod * (rent * 0.80);

            double price = firstPeriodPrice + secondPeriodPrice;
            double broker = price * (percent / 100);

            double totalPrice = price + broker;

            Console.WriteLine($"Total: {totalPrice:f2}");






        }







    }
}