title: Simple equation reversal
body: <p>I am solving follwoing challenge but unable to do so now since last 4 hrs and I am stuck :</p>
  <blockquote>
  <p>Challenge :</p>
  </blockquote>
  <pre><code>&gt; Given a mathematical equation that has *,+,-,/, reverse it as follows:
  &gt; 
  &gt; solve(&quot;100*b/y&quot;) = &quot;y/b*100&quot; 
  &gt; solve(&quot;a+b-c/d*30&quot;) = &quot;30*d/c-b+a&quot;
  </code></pre>
  <p><strong>Code I have made to resolve the challenge</strong></p>
  <pre><code>def solve(s):
      a,b = s.split('/')
      return (b+&quot;/&quot;+a)
  </code></pre>
  <p><strong>expected output:</strong>
  'y/b*100'</p>
  <p><strong>observed output:</strong>
  'y/100*b'</p>
  <p>please need your kind help in resolving this issue :</p>
  <p>Best Regards,
  Diwakar</p>