protected function _calculationValue($unit) {
		if (!isset($this->_Calculator)) {
			$this->_Calculator = new Calculator();
		}
		return $this->_Calculator->convert(6371.04, Calculator::UNIT_KM, $unit);
	}
protected function _calculationValue($unit) {
		if (!isset($this->_Calculator)) {
			$this->_Calculator = new Calculator();
		}
		return $this->_Calculator->convert(6371.04, Calculator::UNIT_KM, $unit);
	}
protected function _calculationValue ( $ unit ) { if ( ! isset ( $ this -> _Calculator ) ) { $ this -> _Calculator = new Calculator ( ) ; } return $ this -> _Calculator -> convert ( 6371.04 , Calculator :: UNIT_KM , $ unit ) ; }
Get the current unit factor

@param int $unit Unit constant
@return float Value
Get the current unit factor