A bus is driving from place A to place B. It leaves at 11:00 am and arrives at 4:00 pm. The distance between the two places is 225 kilometers. How many kilometers does this bus travel on average per hour?
一辆大客车从A地开往B地，上午11时开出，下午4时到达，两地相距225千米，这辆客车平均每小时行驶多少千米？
<gadget id="calculator">16 - 11</gadget>
<output>5</output>

<gadget id="calculator">225 / 5</gadget>
<output>45</output>

<result>45</result>