A car travels 140 kilometers in 2 hours, and the road between A and B is 350 kilometers long. At this speed, how many hours will it take to get from A to B? (answer with ratio)
一辆汽车2小时行驶140千米，甲乙两地之间的公路长350千米．照这样的速度，从甲地到乙地还需要几小时？(用比例解答)
<gadget id="calculator">350 - 140</gadget>
<output>210</output>

<gadget id="calculator">140 / 2</gadget>
<output>70</output>

<gadget id="calculator">210 / 70</gadget>
<output>3</output>

<result>3</result>