import java.util.Scanner;

public class FuelTank2 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String fuelType = scanner.nextLine();
        double fuelQty = Double.parseDouble(scanner.nextLine());
        String discountCard = scanner.nextLine();
        double fuelPrice = 0.0;
        double ttlFuelPrice = 0.0;
        switch (fuelType) {
            case "Gas":
                fuelPrice = 0.93;
                if (discountCard.equals("Yes")) {
                    fuelPrice = fuelPrice - 0.08;
                    if (fuelQty > 25) {
                        ttlFuelPrice = fuelPrice *fuelQty * 0.9;
                    } else if (fuelQty > 20 || fuelQty ==25)  {
                        ttlFuelPrice = fuelPrice*fuelQty * 0.92;
                    } else {
                        ttlFuelPrice = fuelPrice * fuelQty;
                    }
                } else {
                    if (fuelQty > 25) {
                        ttlFuelPrice = ttlFuelPrice * 0.9;
                    } else if (fuelQty > 20 || fuelQty ==25){
                        ttlFuelPrice = fuelPrice * fuelQty * 0.92;
                    } else {
                        ttlFuelPrice = fuelPrice * fuelQty;
                    }
                }
                break;
            case "Gasoline":
                fuelPrice = 2.22;
                if (discountCard.equals("Yes")) {
                    fuelPrice = fuelPrice - 0.18;
                    if (fuelQty > 25) {
                        ttlFuelPrice = fuelPrice *fuelQty * 0.9;
                    } else if (fuelQty > 20 || fuelQty ==25) {
                        ttlFuelPrice = fuelPrice*fuelQty * 0.92;
                    } else {
                        ttlFuelPrice = fuelPrice * fuelQty;
                    }
                } else {
                    if (fuelQty > 25) {
                        ttlFuelPrice = fuelPrice * fuelQty * 0.9;
                    } else if (fuelQty > 20 || fuelQty ==25) {
                        ttlFuelPrice = fuelPrice * fuelQty* 0.92;
                    } else {
                        ttlFuelPrice = fuelPrice * fuelQty;
                    }
                }
                break;
            case "Diesel":
                fuelPrice = 2.33;
                if (discountCard.equals("Yes")) {
                    fuelPrice = fuelPrice - 0.12;
                    if (fuelQty > 25) {
                        ttlFuelPrice = ttlFuelPrice * 0.9;
                    } else if (fuelQty > 20 || fuelQty ==25) {
                        ttlFuelPrice = ttlFuelPrice * 0.92;
                    } else {
                        ttlFuelPrice = fuelPrice * fuelQty;
                    }
                } else {
                    if (fuelQty > 25) {
                        ttlFuelPrice = ttlFuelPrice * 0.9;
                    } else if (fuelQty > 20 || fuelQty ==25) {
                        ttlFuelPrice = ttlFuelPrice * 0.92;
                    } else {
                        ttlFuelPrice = fuelPrice * fuelQty;
                    }

                }
                break;

        }
        System.out.printf("%.2f lv.", ttlFuelPrice);

    }


}