calc.rb

puts "What year were your born?"
birth_year = gets.chomp

puts "What month were your born?"
birth_month = gets.chomp

puts "What day were your born?"
birth_day = gets.chomp

seconds_diff = Time.now - Time.new(birth_year, birth_month, birth_day)
pretty_print_seconds = seconds_diff.round(0).to_s.reverse.gsub(/(\d{3})(?=\d)/, '\\1,').reverse
puts "You are #{pretty_print_seconds} seconds old."

years = seconds_diff / 60 / 60 / 24 / 365
puts "You are #{years.round(2)} years old."