The reciprocal of a number is 2, what is (1/2) of this number.
一个数的倒数是2，这个数的(1/2)是多少．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(1/2) * (1/2)</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>