(1/16), (1/4), how much, 4, 16.
(1/16)，(1/4)，多少，4，16．
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(1/4) * 4</gadget>
<output>1</output>

<result>1</result>