title: How to multiply -1 with BigDecimal
body: <p>In Java, I have a big decimal number , I want to multiply with -1. </p>
  
  <pre><code>BigDecimal amount, total;
  total = amount*-1; 
  </code></pre>
  
  <p>If i give like this, it is throwing error upfront. How can I multiply -1 with bigdecimal number.</p>