package pb1;

import java.util.Scanner;

public class FreeNedelq {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        int pictures = Integer.parseInt(scanner.nextLine());
        String picturesType = scanner.next();
        String purchase = scanner.nextLine();
        double priceForOne = 0.0;
        double wholePrice = 0.0;
        double sale = 0.0;
        if (purchase.equals("online")) {
            if (picturesType.equals("9X13") && pictures >= 50) {
                priceForOne = 0.16;
                sale = 0.02;
                wholePrice = (priceForOne * pictures) * 0.95;
            } else if (picturesType.equals("10X15") && pictures >= 80) {
                priceForOne = 0.16;
                wholePrice = (priceForOne * pictures) * 0.97;
            } else if (picturesType.equals("13X18") && pictures >= 100) {
                priceForOne = 0.38;
                wholePrice = (priceForOne * pictures) * 0.95;
            } else if (picturesType.equals("13X18") && pictures >= 50 && pictures <= 100) {
                priceForOne = 0.38;
                wholePrice = (priceForOne * pictures) * 0.97;
            } else if (picturesType.equals("20X10") && pictures > 50) {
                priceForOne = 2.90;
                wholePrice = (priceForOne * pictures) * 0.91;
            } else if (picturesType.equals("20X10") && pictures >= 10 && pictures <= 50) {
                priceForOne = 2.90;
                wholePrice = (priceForOne * pictures) * 0.93;
            }
        }
        if (purchase.equals("offline")) {
            if (picturesType.equals("9X13") && pictures >= 50) {
                priceForOne = 0.16;
                sale = 1;
                wholePrice = (priceForOne * pictures) * 0.95;
            } else if (picturesType.equals("10X15") && pictures >= 80) {
                priceForOne = 0.16;
                wholePrice = (priceForOne * pictures) * 0.97;
            } else if (picturesType.equals("13X18") && pictures >= 50 && pictures <= 100) {
                priceForOne = 0.38;
                wholePrice = (priceForOne * pictures) * 0.97;
            } else if (picturesType.equals("20X10") && pictures >= 10 && pictures <= 50) {
                priceForOne = 2.90;
                wholePrice = (priceForOne * pictures) * 0.93;
            } else if (picturesType.equals("20X10") && pictures > 50) {
                priceForOne = 2.90;
                wholePrice = (priceForOne * pictures) * 0.91;
            } else if (picturesType.equals("13X18") && pictures >= 100) {
                priceForOne = 0.38;
                wholePrice = (priceForOne * pictures) * 0.95;
            }
        }
        double result = wholePrice * sale;
        System.out.printf("%.2fBGN", result );
    }
}