To build a 690-meter-long road, 150 meters have been built. The rest is going to be repaired in 9 days. How many meters are repaired on average per day?
修一段690米长的公路，已经修了150米．剩下的准备9天修完，平均每天修多少米？
<gadget id="calculator">690 - 150</gadget>
<output>540</output>

<gadget id="calculator">540 / 9</gadget>
<output>60</output>

<result>60</result>