title: invalid arithmetic operatior
body: <p>I am trying to multiply a integer value with a decimal <code>value = 2*1.5</code>. but how it gives me this <strong>error</strong>,<code>"invalid arithmetic operator"</code>.</p>
  
  <p>I researched online and most of the solution provided is just to add that | bc behind the decimal value but however I tried it and it still doesn't work,</p>
  
  <pre><code>results=$((2*"1.5"|bc))
  echo $results
  </code></pre>