To dig a 330-meter-long tunnel, there are two engineering teams, A and B, working simultaneously from both ends. Team A digs 16 meters forward every day, and team B digs 17 meters forward every day. How many days will it take to dig this tunnel?
挖一条330米长的隧道，有甲、乙两支工程队从两端同时施工，甲队每天向前挖16米，乙队每天向前挖17米，挖通这条隧道需要多少天？
<gadget id="calculator">17 + 16</gadget>
<output>33</output>

<gadget id="calculator">330 / 33</gadget>
<output>10</output>

<result>10</result>