The distance between A and B is 500 kilometers. A car travels 200 kilometers from A to B in 2 hours. According to this calculation, how long will it take to reach B?
甲乙两地相距是500千米，一辆汽车从甲地到乙地2时行了200千米，照这样计算，到乙地还有几时？
<gadget id="calculator">500 - 200</gadget>
<output>300</output>

<gadget id="calculator">200 / 2</gadget>
<output>100</output>

<gadget id="calculator">300 / 100</gadget>
<output>3</output>

<result>3</result>