Solve the equation: x+(2/9)x=11.
解方程：x+(2/9)x=11．
<gadget id="calculator">2 / 9</gadget>
<output>2/9 = around 0.222222</output>

<gadget id="calculator">1 + (2/9)</gadget>
<output>11/9 = around 1.222222</output>

<gadget id="calculator">11 / (11/9)</gadget>
<output>9</output>

<result>9</result>