The original mobile phone is 998 yuan, and the price is reduced to 539 yuan. Parents each buy one. How much money is saved in total?
一部手机原件998元，降价后卖539元，爸爸妈妈各买了一部，一共节省了多少钱？
<gadget id="calculator">998 - 539</gadget>
<output>459</output>

<gadget id="calculator">459 * 2</gadget>
<output>918</output>

<result>918</result>