(4/9)*(4/9)=how much
(4/9)*(4/9)=多少
<gadget id="calculator">4 / 9</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">(4/9) * (4/9)</gadget>
<output>16/81 = around 0.197531</output>

<result>16/81 = around 0.197531</result>