Two engineering teams, A and B, excavate a 132-meter-long culvert from both ends at the same time. Team A excavates an average of 5 meters per day, and Team B excavates an average of 7 meters per day. How many days will it take to dig through this culvert?
甲乙两个工程队同时分别从两端开凿一座132米长的涵洞．甲队平均每天开凿5米，乙队平均每天开凿7米．凿通这座涵洞需要几天？
<gadget id="calculator">5 + 7</gadget>
<output>12</output>

<gadget id="calculator">132 / 12</gadget>
<output>11</output>

<result>11</result>