The distance between A and B is 1200 kilometers, and a train travels 240 kilometers in 3 hours. At this speed, how many hours does it take for the train to travel from A to B?
甲乙两地相距1200千米，一列火车3小时行驶了240千米，照这样的速度，从甲地到乙地火车需要行驶多少小时？
<gadget id="calculator">240 / 3</gadget>
<output>80</output>

<gadget id="calculator">1_200 / 80</gadget>
<output>15</output>

<result>15</result>