The distance between A and B is 630 kilometers, and a car travels 270 kilometers in 3 hours. According to this calculation, how many hours will it take to complete the remaining distance?
A、B两地相距630千米，一辆汽车3小时行270千米．照这样计算，行完剩下的路程还要多少小时？
<gadget id="calculator">630 - 270</gadget>
<output>360</output>

<gadget id="calculator">270 / 3</gadget>
<output>90</output>

<gadget id="calculator">360 / 90</gadget>
<output>4</output>

<result>4</result>