using System;

namespace Cinema
{
    class Program
    {
        static void Main(string[] args)
        {
            string typeOfProjection = Console.ReadLine();
            int r = int.Parse(Console.ReadLine());
            int c = int.Parse(Console.ReadLine());

            double income = 0.00;

            switch (typeOfProjection)
            {
                case "Premiere": income = r * c * 12; break;
                case "Normal": income = r * c * 7.5; break;
                case "Discount": income = r * c * 5; break;
            }
            Console.WriteLine($"{income:f2}");
        }
    }
}