import java.util.Scanner;

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

        int numPictures = Integer.parseInt(scanner.nextLine());
        String typePictures = scanner.nextLine();
        String order = scanner.nextLine();

        double pictures = 0;
        double sum = 0;

        switch (typePictures) {
            case "9X13":
                pictures = 0.16;
                sum = numPictures * pictures;
                if (numPictures >= 50) {
                    sum -= sum * 0.05;
                }
                break;
            case "10X15":
                pictures = 0.16;
                sum = numPictures * pictures;
                if (numPictures >= 80) {
                    sum -= sum * 0.03;
                }
                break;
            case "13X18":
                pictures = 0.38;
                sum = numPictures * pictures;
                if (numPictures >= 50 && numPictures <= 100) {
                    sum -= sum * 0.03;
                } else if (numPictures > 100) {
                    sum -= 0.05 * sum;
                }
                break;
            case "20X30":
                pictures = 2.90;
                sum = numPictures * pictures;
                if (numPictures >= 10 && numPictures <= 50) {
                    sum -= 0.07 * sum;
                } else if (numPictures > 50) {
                    sum -= sum * 0.09;
                }
                break;

        }
        if (order.equals("online")) {
            sum -= 0.02;
        }
        System.out.printf("%.2fBGN", sum);


    }

}