title: How to get average of column values in laravel
body: <p>Lets say I have this column</p>
  
  <pre><code>star
  ----
  1    
  3    
  3    
  1    
  2    
  5    
  3
  </code></pre>
  
  <p>It has seven rows and there are integer values! I want to have it added and divided by the rows there are.</p>
  
  <p>How do I do it in laravel. I can do it in plain php but I want to learn it in laravel.</p>