The road between A and B is 528 kilometers long. A car departs from A at 8:30 am and arrives at B at 3:30 pm, with an hour of rest in between. How many miles per hour does the car travel on average?
甲、乙两城之间的公路长528千米，一辆汽车上午8时30分从甲城出发，下午3时30分到达乙城，中间休息了1小时．汽车平均每小时行驶多少千米？
<gadget id="calculator">7 - 1</gadget>
<output>6</output>

<gadget id="calculator">528 / 6</gadget>
<output>88</output>

<result>88</result>