/**
* Short description of method evaluateArtihmOperation
*
* @access public
* @author firstname and lastname of author, <*****@*****.**>
* @param array $variable
* @return mixed
*/
public function evaluateArithmOperation($variable = array())
{
$operation = new core_kernel_rules_Operation($this->getUri(), __METHOD__);
return $operation->evaluate($variable);
}
