code: public function root($value)
      {
          $value = Cast::Float($value);
  
          if ($this->value === null) {
              return new FloatType($this->value);
          }
  
          return new FloatType(pow($this->value, 1 / $value));
      }
docs: Nth root. Product is always FloatType.
  
  @return FloatType