To build a 240-kilometer road, 80 kilometers have already been built, and the rest will take 20 days to finish. How many kilometers are repaired on average per day?
修一条长240千米的公路，已经修了80千米，剩下的要20天修完，平均每天修多少千米？
<gadget id="calculator">240 - 80</gadget>
<output>160</output>

<gadget id="calculator">160 / 20</gadget>
<output>8</output>

<result>8</result>