Xiaogang rode a bicycle from point A to point B for 150 kilometers in 5 hours. According to this calculation, the total distance from point A to point B is 210 kilometers. How many hours will it take to ride? (Answer with proportional knowledge)
小刚骑自行车从A地到B地5小时骑了150千米，照这样计算，从A地到B地共210千米，还需骑几小时？(用比例知识解答)
<gadget id="calculator">210 - 150</gadget>
<output>60</output>

<gadget id="calculator">150 / 5</gadget>
<output>30</output>

<gadget id="calculator">60 / 30</gadget>
<output>2</output>

<result>2</result>