Two engineering teams, A and B, are paving a 2.8-kilometer-long road. They work simultaneously from both ends. Team A paves 80 meters per day, and team B paves 60 meters per day. How many days will it take to pave this road?
甲、乙两个工程队铺一条长2.8千米的公路，他们从两端同时施工，甲队每天铺80米，乙队每天铺60米．铺完这条公路需要多少天？
<gadget id="calculator">2.8 * 1_000</gadget>
<output>2_800</output>

<gadget id="calculator">80 + 60</gadget>
<output>140</output>

<gadget id="calculator">2_800 / 140</gadget>
<output>20</output>

<result>20</result>