To build a road with a length of 1.6 km, and build the full length (1/2) every day, how many days can the road be built.
修一条长1.6km的路，每天修全长的(1/2)，多少天可以修完这条路．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 / (1/2)</gadget>
<output>2</output>

<result>2</result>