An engineering team wants to repair a 660-meter-long road. It has been repaired for 16 days and there are still 20 meters left to be repaired. How many meters are repaired per day on average?
一个工程队要修一条长660米的公路，已经修了16天还剩下20米没修，平均每天修多少米？
<gadget id="calculator">660 - 20</gadget>
<output>640</output>

<gadget id="calculator">640 / 16</gadget>
<output>40</output>

<result>40</result>