from datetime import datetime
def calculateAge(name, age):
    print('Hello Mr. {}'.format(name))
    year = datetime.now().year
    born = int(year)-int(age)
    hundredIn = born+100
    print('you will b 100 years old by {}'.format(hundredIn))
    # return hundredIn



def main():
    name = input('Enter your name: ')
    age = input('enter your age: ')
    calculateAge(name,age)


if __name__ == '__main__':
    main()