The flight distance from Qingdao to Guangzhou is about 2400 kilometers. A passenger plane takes off from Qingdao at 10:30 am and arrives at Guangzhou Airport at 1:30 pm. How many kilometers per hour does this airliner fly on average?
青岛到广州的航程约是2400千米，一架客机上午10：30从青岛起飞，下午1：30到达广州机场．这架客机平均每小时飞行多少千米？
<gadget id="calculator">2_400 / 3</gadget>
<output>800</output>

<result>800</result>