Add 3 (1/9) to 8 (1/9), and subtract 11 (1/9), what is the result?
8个(1/9)加上3个(1/9)，再减去11个(1/9)，结果是多少．
<gadget id="calculator">8 / 9</gadget>
<output>8/9 = around 0.888889</output>

<gadget id="calculator">3 / 9</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">11 / 9</gadget>
<output>11/9 = around 1.222222</output>

<gadget id="calculator">(1/3) - (11/9)</gadget>
<output>-8/9 = around -0.888889</output>

<gadget id="calculator">(8/9) + (-8/9)</gadget>
<output>0</output>

<result>0</result>