def old_roman_numeral user_number

  (user_number / 1000).floor.times do
    print 'M'
    user_number = user_number - 1000
   end

  (user_number / 500).floor.times do
    print 'D'
    user_number = user_number - 500
  end

  (user_number / 100).floor.times do
    print 'C'
    user_number = user_number - 100
  end

  (user_number / 50).floor.times do
    print'L'
    user_number = user_number - 50
  end

  (user_number / 10).floor.times do
    print 'X'
    user_number = user_number - 10
  end

  (user_number / 5).floor.times do
    print 'V'
    user_number = user_number - 5
  end

  (user_number / 1).floor.times do
    print 'I'
  end

end

puts 'Enter number:'
user_number = gets.chomp.to_i
puts 'Your number in old roman numerals:'
old_roman_numeral user_number