title: Scheme : precision of decimal numbers
body: <p>How can I convert <code>42.0</code> to <code>42.00</code> in Scheme?<br/>
  For Example (In Scheme):<br/>
  When I do <code>(/ 20.00 2)</code>, I get <code>10.0</code>. I want <code>10.00</code> as the result of above instead of <code>10.0</code></p>