The downstairs of the cinema has 680 seats, which is 4 times that of the upstairs seats. How many seats does this cinema have?
电影院楼下有座位680个，是楼上座位的4倍，这个电影院一共有多少个座位？
<gadget id="calculator">680 / 4</gadget>
<output>170</output>

<gadget id="calculator">680 + 170</gadget>
<output>850</output>

<result>850</result>