The total length of the Beijing-Shanghai high-speed rail line is 560 kilometers. A train departs from Beijing at 9:30 am and arrives in Shanghai at 1:30 pm. How many kilometers does the train travel on average per hour?
北京到上海的高铁线全长560千米，一列火车上午9：30从北京出发，下午1：30到达上海，火车平均每小时行多少千米？
<gadget id="calculator">560 / 4</gadget>
<output>140</output>

<result>140</result>