title: Remove the "E" in a number format for very small numbers
body: <p>When I echo this: </p>
  
  <pre><code>round($number* 100, 12)
  </code></pre>
  
  <p>I get output numbers that look like this:</p>
  
  <pre><code>6.6936406E-5
  </code></pre>
  
  <p>How do I remove the "E" and show the numbers as they are, i.e. like this:</p>
  
  <pre><code>0.0000066936406
  </code></pre>