title: What does division by 1e9d mean?
body: <p>This is the snippet:</p>
  
  <pre><code>String myTime = someTime / 1e9d + ",";
  </code></pre>
  
  <p><code>someTime</code> is derived by using <code>System.nanoTime()</code>. What does <code>1e9d</code> do here?</p>