title: Append & prepend string to existing rows
body: <p>I have a table of numbers:</p>
  
  <pre><code>1
  2
  3
  4
  5
  6
  7
  .
  .
  .
  </code></pre>
  
  <p>What i would like to get:</p>
  
  <pre><code>*1*
  *2*
  *3*
  *4*
  *5*
  *6*
  *7*
  .
  .
  .
  </code></pre>
  
  <p>I have written a formula, but i dont know how to apply this function to the existing table. I keep getting some kind of reference error. <code>(REF!)</code></p>
  
  <p>My formula:</p>
  
  <pre><code>= "*" &amp; A2:A(whatever number is last) &amp; "*"
  </code></pre>