To build a road with a length of 120 meters, A road repair team builds 7 meters a day, and B road repair team builds 8 meters a day. Two pairs of joint cultivation, how many days can it be completed?
修一条长120米的公路，甲修路队每天修7米，乙修路队每天修8米．两对合修，几天可以修完？
<gadget id="calculator">8 + 7</gadget>
<output>15</output>

<gadget id="calculator">120 / 15</gadget>
<output>8</output>

<result>8</result>