To build a road with a length of 1.6 km, build the full length (1/3) every day, how many days can the road be built.
修一条长1.6km的路，每天修全长的(1/3)，多少天可以修完这条路．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

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

<result>3</result>