piece of colored paper was used to make small flags (2/9), and was used to make window grilles (5/9). How much of this paper is left?
一张彩色纸，做小旗用去它的(2/9)，做窗花用去了(5/9)．还剩下这张纸的几分之几？
<gadget id="calculator">2 / 9</gadget>
<output>2/9 = around 0.222222</output>

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

<gadget id="calculator">1 - (2/9) - (5/9)</gadget>
<output>2/9 = around 0.222222</output>

<result>2/9 = around 0.222222</result>