using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

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



            string town = Console.ReadLine();
            double salaries = double.Parse(Console.ReadLine());
            double discount = 0;
            if (town == "Sofia")
            {
                if (salaries >= 0 && salaries <= 500)
                {
                    discount = 0.05;
                }
                else if (salaries > 500 && salaries <= 1000)
                {
                    discount = 0.07;
                }
                else if (salaries > 1000 && salaries <= 10000)
                {
                    discount = 0.08;
                }
                else if (salaries > 10000)
                {
                    discount = 0.12;
                }
            }
            else if (town == "Varna")
            {
                if (salaries >= 0 && salaries <= 500)
                {
                    discount = 0.045;
                }
                else if (salaries > 500 && salaries <= 1000)
                {
                    discount = 0.075;
                }
                else if (salaries > 1000 && salaries <= 10000)
                {
                    discount = 0.10;
                }
                else if (salaries > 10000)
                {
                    discount = 0.13;
                }
            }
            else if (town == "Plovdiv")
            {
                if (salaries >= 0 && salaries <= 500)
                {
                    discount = 0.055;
                }
                else if (salaries > 500 && salaries <= 1000)
                {
                    discount = 0.08;
                }
                else if (salaries > 1000 && salaries <= 10000)
                {
                    discount = 0.12;
                }
                else if (salaries > 10000)
                {
                    discount = 0.145;
                }
            }
            else
            {
                Console.WriteLine("error");
                return;
            }


            if (discount > 0)
            {
                double result = salaries * discount;
                Console.WriteLine($"{result:f2}");
            }
            else
            {
                Console.WriteLine("error");
            }

        }
    }
}