The cinema is divided into upper and lower floors. There are 384 seats upstairs, and 120 more seats upstairs than downstairs. How many seats are there in total?
电影院分上下两层，楼上有384个座位，楼上比楼下多120个座位，电影院一共有多少个座位？
<gadget id="calculator">384 - 120</gadget>
<output>264</output>

<gadget id="calculator">264 + 384</gadget>
<output>648</output>

<result>648</result>