There are 12 badmintons in a box, and (1/3) has been used up. How many are left?
一盒羽毛球共12个，已经用去了(1/3)，还剩多少个？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 - (1/3)</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">12 * (2/3)</gadget>
<output>8</output>

<result>8</result>