What is (1/4) of (2/9) hours?
(2/9)小时的(1/4)是多少．
<gadget id="calculator">2 / 9</gadget>
<output>2/9 = around 0.222222</output>

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

<gadget id="calculator">(2/9) * (1/4)</gadget>
<output>1/18 = around 0.055556</output>

<result>1/18 = around 0.055556</result>