04. Orders

order_type = input()
order_quantity = int(input())


def sum_orders(order, quantity):
    result = None
    if order == 'coffee':
        result = float(quantity) * 1.50
    if order == 'water':
        result = float(quantity) * 1.00
    if order == 'coke':
        result = float(quantity) * 1.40
    if order == 'snacks':
        result = float(quantity) * 2.00
    return "%.2f" % result


print(sum_orders(order_type, order_quantity))