The road construction team wants to build a 400-meter-long road. It has been repaired for 8 days, and there are still 80 meters left. How many meters are repaired per day on average?
修路队要修一条长400米的公路，已经修了8天，还剩80米．平均每天修多少米？
<gadget id="calculator">400 - 80</gadget>
<output>320</output>

<gadget id="calculator">320 / 8</gadget>
<output>40</output>

<result>40</result>