A bag of flour, each time you eat (1/15) of this bag of flour, how many times you can eat it up.
一袋面粉，每次吃掉这袋面粉的(1/15)，多少次可以吃完．
<gadget id="calculator">1 / 15</gadget>
<output>1/15 = around 0.066667</output>

<gadget id="calculator">1 / (1/15)</gadget>
<output>15</output>

<result>15</result>