A car travels from A to B at 70 kilometers per hour and arrives in 5 hours. If it travels 87.5 kilometers per hour, how many hours will it take to arrive? (Solve with ratio)
一辆汽车从甲地开往乙地，每小时行70千米，5小时到达，如果每小时行87.5千米，需要几小时到达？(用比例解)
<gadget id="calculator">70 * 5</gadget>
<output>350</output>

<gadget id="calculator">350 / 87.5</gadget>
<output>4</output>

<result>4</result>