There are 330 seats upstairs in the cinema. There are three times as many seats downstairs as there are upstairs. How many seats are there in the cinema?
电影院楼上有330个座位．楼下的座位是楼上的3倍．电影院一共有多少个座位？
<gadget id="calculator">330 * 3</gadget>
<output>990</output>

<gadget id="calculator">330 + 990</gadget>
<output>1_320</output>

<result>1_320</result>