# Exercise 4.6

def computepay(hrs, rate):
    if hrs >= 40:
        pay = (40 * rate) + ((hrs - 40) * rate * 1.5)
    else:
        pay = (hrs * rate)

    return pay

try:
    hrs = float(raw_input('How many hours did you work this week? \n'))
    rate = float(raw_input('What is your rate? \n'))

except:
    print 'Please enter a number. \n'
    quit()

print 'Pay: \n', computepay(hrs, rate)