(3/5): x=0.8, then x=how much.
(3/5)：x=0.8，那么x=多少．
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">(3/5) / 0.8</gadget>
<output>0.75</output>

<result>0.75</result>