The distance between Zaozhuang and Qingdao is 450 kilometers. The bus departs from Zaozhuang at 8:20 am and arrives in Qingdao at 13:20 noon. How many kilometers does the car travel on average per hour?
枣庄到青岛相聚相距450千米，汽车上午8：20从枣庄开出，中午13：20到达青岛，汽车平均每小时行多少千米？
<gadget id="calculator">450 / 5</gadget>
<output>90</output>

<result>90</result>