title: Ocaml : multiply expression (*) int int -> int
body: <p>Why Ocaml does not support <code># (*) int int -&gt; int</code> expression operation as <code># (+) int int -&gt; int</code>? </p>
  
  <p>(i.e: <code># (/) 81 9 -&gt; 9</code>, <code># (*) 9 9 -&gt; Warning 1: this is the start of a comment.</code>)</p>