The distance between A and B is 1200 kilometers. A train travels 280 kilometers in 3.5 hours from A. According to this calculation, how many hours will it take to reach B?
A、B两地相距1200千米，一列火车从A地出发3.5小时行280千米，照这样计算，还要几小时才能到达B地？
<gadget id="calculator">1_200 - 280</gadget>
<output>920</output>

<gadget id="calculator">280 / 3.5</gadget>
<output>80</output>

<gadget id="calculator">920 / 80</gadget>
<output>23/2 = around 11.5</output>

<result>23/2 = around 11.5</result>