Basic Calculator Using Functions & Operators

puts "simple calculator"
25.times { print "-" }
puts
puts "enter first number"
num_1 = gets.chomp
puts "enter the second number"
num_2 = gets.chomp
puts "what do you want to do"
puts "(M)ultiple, (D)ivide, (S)ubtraction, (A)ddition, (R)emainder"
type = gets.chomp
puts "You have selected #{type}"
if type == "M"
  puts "#{num_1} Times #{num_2} equals #{num_1.to_f * num_2.to_f}"
elsif type == "D"
  puts "#{num_1} Divided by #{num_2} equals #{num_1.to_f / num_2.to_f}"
elsif type == "A"
  puts "#{num_1} Plus #{num_2} equals #{num_1.to_f + num_2.to_f}"
elsif type == "S"
  Puts "#{num_1} minus #{num_2} is #{num_1.to_f - num_2.to_f}"
elsif type == "R"
  puts "#The remainder of #{num_1} and #{num_2} is #{num_1.to_f % num_2.to_f}"
else
  puts "You need to select the correct input (Input is Case Sensitive)"
end