If a is (1/3) of b, then b is how much of a.
如果a是b的(1/3)，那么b就是a的多少．
<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>