Ruby no implicit conversion of Fixnum into String (TypeError)

Question

I am trying to answer the following question from Chris Pine\'s \"Learn to Program\" book:

Leap years. Write a program that asks for a starting year and a

Answer 1

Add a .to_i to your gets.chomp calls. You're trying to do math operations on text. When inputted from the console, everything starts out as text, even if it's numeric looking text.