What is the reciprocal of the product of (4/9) and (5/2)?
(4/9)和(5/2)的积的倒数是多少？
<gadget id="calculator">4 / 9</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">5 / 2</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">(4/9) * (5/2)</gadget>
<output>10/9 = around 1.111111</output>

<gadget id="calculator">1 / (10/9)</gadget>
<output>9/10 = around 0.9</output>

<result>9/10 = around 0.9</result>