title: emacs : a minor mode to show numbers in all kinds of radix
body: <p>I'm looking for an Emacs package that can recognise numbers and their radix.</p>
  
  <p>I would like it to be interactive (to give the value of the number selected or at point).</p>
  
  <p>The returned values could be printed to the minibuffer (then messages buffer) or to a separate buffer. </p>
  
  <p>Can someone explain how can I get access those values and what are the steps I need to take to create such a function?</p>