time = int(input())
speed = int(input())
total_distance = float(speed*time)
fuel_spent = total_distance/12
print("%.3f"%fuel_spent)
161a9675282898cbbaeb74c92f8784d57f07f27f
<mask token>

<mask token>
print('%.3f' % fuel_spent)

time = int(input())
speed = int(input())
total_distance = float(speed * time)
fuel_spent = total_distance / 12
print('%.3f' % fuel_spent)

time = int(input())
speed = int(input())
total_distance = float(speed*time)
fuel_spent = total_distance/12
print("%.3f"%fuel_spent)