title: How can I do 64-bit arithmetic in Perl?
body: <p>I am a perl newbie,</p>
  
  <p>Can I simply use 64-bit arithmetic in Perl?</p>
  
  <p>For example</p>
  
  <pre><code>$operand1 = 0xFFFFFFFFFFFF;   # 48 bit value
  $operand2 = 0xFFFFFFFFFFFF;   # 48 bit value
  
  $Result = $operand1 * $operand2;
  </code></pre>
  
  <ul>
  <li>I am basically looking for a
  replacement for the int64_t in perl.</li>
  <li>Is there any way to mention, if the
  variable is signed or unsigned?</li>
  </ul>