title: how to set div height auto grow with content having padding style
body: <p>The problem I have is the div height is not grow, so my label block the other element on my page. I know I can set the height for div. But I want grow automatically. How can I do that?</p>
  
  <p>Thank you!</p>
  
  <pre><code>&lt;div id="div"&gt;
  &lt;asp:Button ID="btn" runat="server" Text="Button" /&gt;
  &lt;asp:Label ID="lbl" runat="server" Text="Label" /&gt;
  &lt;/div&gt;
  
  #lbl
  {
      padding: 1em;
  }
  #div
  {
      //What I should do here?
  }
  </code></pre>