title: calculate and replace special numbers in pages (javascript)
body: <p>I am trying to change format of special numbers in my pages.</p>
  
  <p>Numbers format is similar this: <strong>11,111.00 AUD</strong></p>
  
  <p>And these changes should be applied on them:</p>
  
  <ol>
  <li><strong>Extract</strong> clean number from it: (11111)</li>
  <li><strong>Calculate</strong> cost of them: (11111 * 2)</li>
  <li><strong>Change currency</strong> String with USD</li>
  <li><strong>Replace</strong> Previous Result with Default Value: <strong>22222 USD</strong></li>
  </ol>
  
  <p>Please help me to complete this code:</p>
  
  <pre><code>$(document).ready(function (){
  $('body').html( function(i,txt) {return txt.replace(/\d+,\d+.\d+ USD/,'blabla AUD'); });
  });
  </code></pre>