Brazilian Rails

Good night.

I'm trying to use the rails plugin brazilian but I can not. I wonder
if someone already used and how used.

I installed the Brazilian rails with the command: gem install
brazilian-rails
Soon after I added the file config / environment.rb Requires the
following:

require 'brcep'
require 'brdata'
require 'brdinheiro'
require 'brnumeros'
require 'brstring'
require 'brcpfcnpj'

Only now do not know how to proceed.
If someone has an example I am grateful.

Graciously
Adriano Dias da Silva