title: infix prefix postfix
body: <p>I came across this in some brain teaser question bank.</p>
  
  <pre><code>What should be the answer of this?
  ( (3+1) / 3) * 6
  
  I thought it is 7 but the correct answer is 8. 
  </code></pre>
  
  <p>That can happen only when it is (3+1) * (6/3). Since there are parenthesis given in the expression how can I get 8? I tried to double check and the answer is correct.</p>
  
  <p>Can somebody help me in understanding this?</p>