car drives from A to B at 40 kilometers per hour and arrives in 6 hours; when returning, it travels 80 kilometers per hour, how many hours can it be reached?
一辆汽车从甲地开往乙地，每小时行40千米，6小时到达；返回时，每小时行80千米，几小时可以到达？
<gadget id="calculator">6 / 80</gadget>
<output>3/40 = around 0.075</output>

<gadget id="calculator">40 * (3/40)</gadget>
<output>3</output>

<result>3</result>