sinatra_calc(not working still)

sinatra_calc.rb

require 'sinatra'
require 'sinatra/reloader' if development?
require 'pry'

get "/" do
  "Welcome to this wicked CAL-cu-LAY-torrrr....\n\n"
end

# def shove_it(shove_it)
#   @array = Array.new
#   @array.push(shove_it)
# end
array = []

def show_it
  array.map { |calculation| puts calculation }
end

get "/calculator" do
  show_it
end

get "/calculator/3" do
  #should show the third calculations
end

post "/calculator/add" do
  binding.pry
    calculation = params[:first].to_f + params[:second].to_f
    array << "#{params[:first]} + #{params[:second]} = #{calculation}"
    binding.pry
    "#{params[:first]} + #{params[:second]} = #{calculation}\n\n"
    binding.pry
end

post "/calculator/subtract" do
  calculation = params[:first].to_f - params[:second].to_f
  "#{params[:first]} - #{params[:second]} = #{calculation}\n\n"
end

post "/calculator/multiply" do
  calculation = params[:first].to_f * params[:second].to_f
  "#{params[:first]} * #{params[:second]} = #{calculation}\n\n"
end

post "/calculator/divide" do
  calculation = params[:first].to_f / params[:second].to_f
  "#{params[:first]} / #{params[:second]} = #{calculation}\n\n"
end