What is (2/3) the reciprocal of (2/9).
(2/9)的倒数的(2/3)是多少．
<gadget id="calculator">9 / 2</gadget>
<output>9/2 = around 4.5</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">(9/2) * (2/3)</gadget>
<output>3</output>

<result>3</result>