#birth_year = input('Birth Year: ')
# if suppose your are asking for user to enter the input it stored as string value.
# but you can set variable called "birth_year = 1985" then it consider as the interger value.
# birth_year = 1985

#print(type(birth_year))
#age = 2019 - int(birth_year)
#print(type(age))
#print(age)

#execrise

weight_lbs = input('please enter your weight (lbs) ? ')
weight_kg = int(weight_lbs) * 0.45
print(weight_kg)
#print( 'your weight' + str(int(weight)))