title: Rounding up a number to nearest multiple of 5
body: <p>Does anyone know how to round up a number to its nearest multiple of 5?  I found an algorithm to round it to the nearest multiple of 10 but I can't find this one.</p>
  
  <p>This does it for ten.</p>
  
  <pre><code>double number = Math.round((len + 5)/ 10.0) * 10.0;
  </code></pre>