When x=how much, the ratio of (1/2):x is just the smallest prime number.
当x=多少时，(1/2)：x的比值恰好是最小素数．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

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

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