Calculation: (5/9)-(2/11)+(4/9)-(9/11).
计算：(5/9)-(2/11)+(4/9)-(9/11)．
<gadget id="calculator">5 / 9</gadget>
<output>5/9 = around 0.555556</output>

<gadget id="calculator">2 / 11</gadget>
<output>2/11 = around 0.181818</output>

<gadget id="calculator">(5/9) - (2/11)</gadget>
<output>37/99 = around 0.373737</output>

<gadget id="calculator">4 / 9</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">9 / 11</gadget>
<output>9/11 = around 0.818182</output>

<gadget id="calculator">(4/9) - (9/11)</gadget>
<output>-37/99 = around -0.373737</output>

<gadget id="calculator">(37/99) + (-37/99)</gadget>
<output>0</output>

<result>0</result>