title: What is the size of a character packed integer in comparison with its original size?
body: <p>Suppose that <code>I</code> is the size of a <code>T</code> integer.
  What is the maximum size of a string <code>S</code> that contains the digits of <code>T</code> arranged into characters?
  For example:</p>
  
  <pre><code>T = 12345
  S = '12345'
  </code></pre>