My sister walked a total of 18 kilometers from 8:00 am to 2:00 pm. How many kilometers does my sister walk on average per hour?
姐姐从上午8时走到下午2时，共走了18千米，姐姐平均每小时走多少千米？
<gadget id="calculator">18 / 6</gadget>
<output>3</output>

<result>3</result>