A car travels 60 kilometers per hour, and it takes 15 hours to travel from A to B. If you travel 90 kilometers per hour when you come back, how many hours will it take to return from the original road?
一辆汽车每小时行驶60千米，从甲地到乙地需行15小时．如果回来时每小时行90千米，那么从原路返回时需行多少小时？
<gadget id="calculator">15 / 90</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">60 * (1/6)</gadget>
<output>10</output>

<result>10</result>