The railway between A and B is 490 kilometers long. A train departs from A and travels 196 kilometers in the first 2 hours. At this speed, how many hours will it take to reach B?
甲乙两地铁路长490千米，一列火车从甲地出发，前2小时行驶196千米，照这样的速度，再过几小时才能到达乙地？
<gadget id="calculator">490 - 196</gadget>
<output>294</output>

<gadget id="calculator">196 / 2</gadget>
<output>98</output>

<gadget id="calculator">294 / 98</gadget>
<output>3</output>

<result>3</result>