import java.util.Scanner;

public class Comission {
    public static void main(String[] args) {

        Scanner scanner = new Scanner (System.in);

            String town = scanner.nextLine();
            double sellstaff = Double.parseDouble(scanner.nextLine());
            double result = 0;

            if (town.equals("Sofia")){
                if (sellstaff >=0 && sellstaff <=500){
                  result =  sellstaff * 0.05;
  System.out.printf("%.2f",result);
                }else if (sellstaff>500&&sellstaff<=1000){
                    result = sellstaff *0.07;
  System.out.printf("%.2f",result);
                }else if (sellstaff>1000 && sellstaff<=10000){
                    result = sellstaff * 0.08;
  System.out.printf("%.2f",result);
                }else if (sellstaff>10000) {
                    result = sellstaff * 0.12;
  System.out.printf("%.2f",result);
                }else {
                    System.out.printf("error");
                }


            }else if (town.equals("Varna")){
                if (sellstaff >=0 && sellstaff <=500){
                    result =  sellstaff * 0.045;
  System.out.printf("%.2f",result);
                }else if (sellstaff >500 && sellstaff<=1000){
                    result = sellstaff * 0.075;
  System.out.printf("%.2f",result);
                }else if (sellstaff >1000 && sellstaff<=10000){
                    result = sellstaff * 0.10;
  System.out.printf("%.2f",result);
                }else if (sellstaff>10000){
                    result = sellstaff * 0.13;
  System.out.printf("%.2f",result);
                }else {System.out.printf("error");
                }

            }else if (town.equals("Plovdiv")){

                if (sellstaff>=0 && sellstaff <=500){
                    result =  sellstaff * 0.055;
  System.out.printf("%.2f",result);
                }else if (sellstaff > 500 &&sellstaff<=1000){
                    result = sellstaff * 0.08;
  System.out.printf("%.2f",result);
                }else if (sellstaff>1000&& sellstaff<=10000){
                    result = sellstaff * 0.12;
  System.out.printf("%.2f",result);
                }else  if (sellstaff>10000){
                    result = sellstaff * 0.145;
  System.out.printf("%.2f",result);
                }else{
                    System.out.printf("error");
                }

            }else
                System.out.printf("error");
    }
}