hiqdev / php-units

        return $this->getRoot()->convert($other, $this->convert($this->getRoot(), $quantity));

    }

    public function multiplyByFactor($quantity)

    {

        if (empty($this->factor)) {

            throw new NotConvertibleException('method not yet implement: ' . $this->getName());

        }

        return $this->getCalculator()->multiply($quantity, $this->factor);

    }

    public function divideByFactor($quantity)

    {

        return $this->getCalculator()->multiply($quantity, $this->factor);

    }

    public function divideByFactor($quantity)

    {

        if (empty($this->factor)) {

            throw new NotConvertibleException('method not yet implement: ' . $this->getName());

        }

        return $this->getCalculator()->divide($quantity, $this->factor);

    }

    public function getNode(UnitInterface $unit)

    {