title: how can I round a value with 1 decimal to 2 decimals
body: <p>I need to round values to exactly 2 decimals, but when I use round() it doesn't work, if the value is 0.4, but I need 0.40. </p>
  
  <pre><code>round(0.4232323, 2) = 0.42
  bad: round(0.4, 2) = 0.4
  </code></pre>
  
  <p>How can I solve this?</p>