با استفاده از String Concatenation:

name, age = input(), input()
year = 1400 - int(age) + 100
print(name + " will be 100 years old in the year " + str(year) + ".")

با استفاده از String Formatting:

name, age = input(), input()
year = 1400 - int(age) + 100
print("{} will be 100 years old in the year {}.".format(name, year))