Two engineering teams, A and B, dig a tunnel from both ends at the same time. Team A digs 27 meters a day, and team B digs 23 meters a day. The tunnel is completed after 120 days. How many meters is this tunnel?
甲乙两个工程队分别从两端同时开凿一条隧道，甲队每天凿27米，乙队每天凿23米，120天后凿完．这条隧道长多少米？
<gadget id="calculator">27 + 23</gadget>
<output>50</output>

<gadget id="calculator">50 * 120</gadget>
<output>6_000</output>

<result>6_000</result>