There are a total of 982 people in the two tour groups. They travel by plane. The first plane can seat 536 people, and the second plane can seat 459 people. How many vacant seats are there after they are all on the plane?
两个旅行团组一共有982人，他们乘飞机去旅行，第一架飞机可以座536人，第二架飞机可以座459人，全部坐上飞机后还有多少个空位置？
<gadget id="calculator">459 - 982</gadget>
<output>-523</output>

<gadget id="calculator">536 + (-523)</gadget>
<output>13</output>

<result>13</result>