piece of colored paper was used to make flowers (3/6) and to make small flags (1/6), how much of this paper is left?
一张彩色纸，做花用去了(3/6)，做小旗用去了(1/6)，还剩这张纸的几分之几？
<gadget id="calculator">3 / 6</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">1 - (1/2) - (1/6)</gadget>
<output>1/3 = around 0.333333</output>

<result>1/3 = around 0.333333</result>