title: Limit the amount of decimal places in bc
body: <p>I have this code</p>
  
  <pre><code>codonsnum=$(bc -l &lt;&lt;&lt; "$lengthseq/3")
  </code></pre>
  
  <p>How can I limit the result to only 3 decimals?
  The result is, for example: <code>2.325234985908723</code> and I only want 3 decimals.</p>