title: Rounding integers to nearest multiple of 10
body: <p>I am trying to figure out how to round prices - both ways. For example:</p>
  
  <pre><code>Round down
  43 becomes 40
  143 becomes 140
  1433 becomes 1430
  
  Round up
  43 becomes 50
  143 becomes 150
  1433 becomes 1440
  </code></pre>
  
  <p>I have the situation where I have a price range of say: </p>
  
  <pre><code>£143 - £193
  </code></pre>
  
  <p>of which I want to show as: </p>
  
  <pre><code>£140 - £200
  </code></pre>
  
  <p>as it looks a lot cleaner</p>
  
  <p>Any ideas on how I can achieve this?</p>