# birth_year = input('Bieth year: ')
# print(type(birth_year))
# age = 2021 - int(birth_year)
# print(type(age))
# print(age)

# Exercise Solutions...

weight_lbs = input("Enther you weight (lbs): ")
weight_kg = int(weight_lbs) * 0.45
print(weight_kg)