The total length of the railway from Nanjing to Shanghai is 306 kilometers. A train departs from Nanjing and arrives in Shanghai in 3 hours. How many kilometers does it travel on average per hour?
南京到上海的铁路全长306千米，一列火车从南京开出，3小时后到达上海，平均每小时行多少千米？
<gadget id="calculator">306 / 3</gadget>
<output>102</output>

<result>102</result>