A car drives from A to B, if it travels 80 kilometers per hour, it takes 15 hours to reach it; if it travels 60 kilometers per hour, how many hours does it take to reach it?
一辆汽车从甲地开往乙地，如果每小时行80千米，15小时可以到达；如果每小时行60千米，多少小时可以到达．
<gadget id="calculator">15 / 60</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">80 * (1/4)</gadget>
<output>20</output>

<result>20</result>