If a car travels 150 kilometers in 2 hours, how many hours will it take to travel 900 kilometers?
一辆汽车2小时行150千米，照这样行驶，900千米要行多少小时．
<gadget id="calculator">150 / 2</gadget>
<output>75</output>

<gadget id="calculator">900 / 75</gadget>
<output>12</output>

<result>12</result>