A train travels 405 kilometers from Maoming to Guangzhou. It takes 5 hours. How many kilometers does it travel on average per hour?
一列火车从茂名到广州行驶了405千米，用了5小时，平均每小时行多少千米？
<gadget id="calculator">405 / 5</gadget>
<output>81</output>

<result>81</result>