A car starts at 9:00 and arrives at 14:00, and travels a total of 270 kilometers. How many kilometers does it travel per hour on average?
一辆汽车从9：00出发14：00到达，共行驶270公里，平均每小时行驶多少公里？
<gadget id="calculator">270 / 5</gadget>
<output>54</output>

<result>54</result>