What is the reciprocal of (9/2).
(9/2)的倒数是多少．
<gadget id="calculator">9 / 2</gadget>
<output>9/2 = around 4.5</output>

<gadget id="calculator">1 / (9/2)</gadget>
<output>2/9 = around 0.222222</output>

<result>2/9 = around 0.222222</result>