Litipk\BigNumbers\Decimal::compute2NRoot PHP 메소드

    private static function compute2NRoot($base, $index, $out_scale)
    {
        $result = $base;
        for ($i = 0; $i < $index; $i++) {
            $result = bcsqrt($result, ($out_scale + 1) * ($index - $i) + 1);
        }
        return self::innerRound($result, $out_scale);
    }