title: Conversion of BigInteger to BigDecimal without new Operator
body: <p>How can I convert <code>BigInteger</code> value to <code>BigDecimal</code> without using <code>new</code> operator?</p>
  
  <p>For instance, if I have an integer value like:</p>
  
  <pre><code>abc=4000. 
  </code></pre>
  
  <p>I should get the output as:</p>
  
  <pre><code>xyz= 4000.0
  </code></pre>