(1/3)*(8/9)+(2/3)*(8/9).
(1/3)*(8/9)+(2/3)*(8/9)．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">8 / 9</gadget>
<output>8/9 = around 0.888889</output>

<gadget id="calculator">(1/3) * (8/9)</gadget>
<output>8/27 = around 0.296296</output>

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

<gadget id="calculator">(2/3) * (8/9)</gadget>
<output>16/27 = around 0.592593</output>

<gadget id="calculator">(8/27) + (16/27)</gadget>
<output>8/9 = around 0.888889</output>

<result>8/9 = around 0.888889</result>