The distance between A and B is 623 kilometers. A car departs from A at 8:30 and arrives at B at 15:30. How many kilometers per hour does the car travel on average?
甲乙两地相距623千米，一辆汽车8：30从甲地出发，15：30到达乙地，这辆汽车平均每小时行多少千米？
<gadget id="calculator">623 / 7</gadget>
<output>89</output>

<result>89</result>