To build a road with a length of 3 kilometers, and build (1/4) kilometers every day, how many days can it be completed?
修一条长3千米的路，每天修(1/4)千米，多少天可以修完．
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">3 / (1/4)</gadget>
<output>12</output>

<result>12</result>