To build a 28-kilometer-long road, 10 kilometers have been built, and the rest will be completed in 6 days. How many kilometers are repaired on average per day?
修一条长28千米的公路，已经修了10千米，剩下的分6天修完，平均每天修多少千米？
<gadget id="calculator">28 - 10</gadget>
<output>18</output>

<gadget id="calculator">18 / 6</gadget>
<output>3</output>

<result>3</result>