After the speed of the railway train is increased, it takes 18 hours for a passenger train to travel from point A to point B, which is 25% less than the time before the speed increase. How long does it take for this passenger train to travel from point A to point B before the speed increase?
铁路列车提速后，一列客车从甲地到乙地所用时间是18小时，比提速前时间少用25%，这列客车提速前从甲地到乙地用多长时间？
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">18 / (3/4)</gadget>
<output>24</output>

<result>24</result>