The road between AB and AB is 350 kilometers long. A car travels from A to B and travels 140 kilometers in the first two hours. According to this calculation, how many hours will it take to get from A to B? (Solve with ratio)
AB两地之间的公路长350千米，一辆汽车从A地开往B地，前两小时行驶了140千米，照这样计算，从A地到B共需多少小时？(用比例解)
<gadget id="calculator">350 * 2</gadget>
<output>700</output>

<gadget id="calculator">700 / 140</gadget>
<output>5</output>

<result>5</result>