title: Round to nearest five
body: <p>I need to round a double to nearest five. I can't find a way to do it with the Math.Round function. How can I do this?</p>
  
  <p>What I want:</p>
  
  <pre><code>70 = 70
  73.5 = 75
  72 = 70
  75.9 = 75
  69 = 70
  </code></pre>
  
  <p>and so on..</p>
  
  <p>Is there an easy way to do this?</p>