Fatty takes the train from Shanghai to a small town 600 kilometers away, and travels 150 kilometers in 3 hours. How many hours will it take to reach the destination?
小胖乘火车从上海出发，开往相距600千米的小镇，3小时行150千米，还要多少小时才能到达终点？
<gadget id="calculator">150 / 3</gadget>
<output>50</output>

<gadget id="calculator">600 / 50</gadget>
<output>12</output>

<gadget id="calculator">12 - 3</gadget>
<output>9</output>

<result>9</result>