using System;

namespace rent
{
    class Program
    {
        static void Main(string[] args)
        {
            int months = int.Parse(Console.ReadLine());
            int percentComission = int.Parse(Console.ReadLine());
            double rentPerMonth = double.Parse(Console.ReadLine());

            double rentForSecondHalf = rentPerMonth * 0.80;
            double monthFirsHalf = months / 2;
            double sum = (monthFirsHalf * rentPerMonth) + (rentForSecondHalf * monthFirsHalf);
            double comission = sum * percentComission / 100;
            double total = comission + sum;


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