#Write a function driving_cost() 
#with parameters miles_per_gallon, dollars_per_gallon, and miles_driven
#that returns the dollar cost to drive those miles. 
#All items are of type float. The function called with arguments (20.0, 3.1599, 50.0) returns 7.89975.

#The main program's inputs are the car's miles per gallon and the price of gas in dollars per gallon (both float). 
#Output the gas cost for 10 miles, 50 miles, and 400 miles, by calling your driving_cost() function three times.

#Output each floating-point value with two digits after the decimal point, which can be achieved as follows:
#print(f'{your_value:.2f}')


# Your program must define and call a function: 
# def driving_cost(miles_per_gallon, dollars_per_gallon, miles_driven)


def driving_cost(miles_per_gallon, dollars_per_gallon, miles_driven): 
    return (miles_driven / miles_per_gallon) * dollars_per_gallon 

if__name__ == '__main__':
    miles_per_gallon = float(input())
    dollars_per_gallon = float(input())

    driving_cost1 = (10 / miles_per_gallon) * dollars_per_gallon 
    # number in the parentheses is the miles driven 
    driving_cost2 = (50 / miles_per_gallon) * dollars_per_gallon 
    driving_cost3 = (400/ miles_per_gallon) * dollars_per_gallon

    print(f'{driving_cost1:.2f}')
    print(f'{driving_cost2:.2f}')
    print(f'{driving_cost3:.2f}')