
#lesson
    # birth_year=input("Birth year: ")
    # print(type(birth_year))
    # age = 2021 - int(birth_year)
    # print(type(age))
    # print(age)

#bymyself
pound = input("How much pound are you?: ")
kg = 0.45 * int(pound)
print("You are", kg, "killogramm")