Two construction teams jointly dig a sewage pipe with a length of 1791.6 meters. Team A digs 76.8 meters every day, and team B digs 72.5 meters every day. How many days will it take for the two teams to dig together?
两个施工队合挖一条长1791.6米的污水管道，甲队每天挖76.8米，乙队每天挖72.5米．两队合挖用几天完工？
<gadget id="calculator">76.8 + 72.5</gadget>
<output>149.3</output>

<gadget id="calculator">1_791.6 / 149.3</gadget>
<output>12</output>

<result>12</result>