title: Is it possible to create multi-level ordered list in HTML?
body: <p>I want this:</p>
  
  <pre><code>1. Main
    1.1 sub1
    1.2 sub2
  2. Main2
    2.1 sub3
  </code></pre>
  
  <p>is it possible to do this in HTML? 
  Thanks.</p>