title: How to round a scientific number to n digits while keeping the scientific property?
body: <p>How would I round a scientific number to n digits? But still keep the E...</p>
  
  <p>Desired Output:</p>
  
  <pre><code>round(num,2) ## Just an example, I know this does not work.
  1.78943642E-10 -&gt; 1.79E-10
  2.68289674E-11 -&gt; 2.68E-11
  6.23486821E-15 -&gt; 6.23E-15
  </code></pre>