Calculation: 1-(1/3)-(5/9).
计算：1-(1/3)-(5/9)．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">5 / 9</gadget>
<output>5/9 = around 0.555556</output>

<gadget id="calculator">1 - (1/3) - (5/9)</gadget>
<output>1/9 = around 0.111111</output>

<result>1/9 = around 0.111111</result>