public function multiply($number = null)
    {
        if ($number === null) {
            $this->internalSetOperationModeWithHistory('multiply');
        } elseif ($number instanceof Closure) {
            $this->internalSetOperationModeWithHistory('multiply');
            return $this->group($number);
        } else {
            $this->performOperationOnExpressionEngine('multiply', $number);
        }

        return $this;
    }
public function multiply($number = null)
    {
        if ($number === null) {
            $this->internalSetOperationModeWithHistory('multiply');
        } elseif ($number instanceof Closure) {
            $this->internalSetOperationModeWithHistory('multiply');
            return $this->group($number);
        } else {
            $this->performOperationOnExpressionEngine('multiply', $number);
        }

        return $this;
    }
public function multiply ( $ number = null ) { if ( $ number === null ) { $ this -> internalSetOperationModeWithHistory ( 'multiply' ) ; } elseif ( $ number instanceof Closure ) { $ this -> internalSetOperationModeWithHistory ( 'multiply' ) ; return $ this -> group ( $ number ) ; } else { $ this -> performOperationOnExpressionEngine ( 'multiply' , $ number ) ; } return $ this ; }
Multiplies the current value by a given number.

@param $number

@return $this
Multiplies the current value by a given number .