What is the reciprocal of the smallest prime number divided by 2?
最小的质数除2的倒数，商是多少．
<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>