Two engineering teams jointly excavated a 168-meter-long tunnel, each facing each other from one end, and it took 14 days to get through. Team A excavates 7 meters per day, how many meters does Team B excavate per day?
两个工程队共同开凿一条168米长的隧道，各从一端相向施工，14天打通．甲队每天开凿7米，乙队每天开凿多少米？
<gadget id="calculator">168 / 14</gadget>
<output>12</output>

<gadget id="calculator">12 - 7</gadget>
<output>5</output>

<result>5</result>