There is an air conditioner in a home appliance market, sold (2/3), how many units are left.
一个家电市场有a台空调机，卖出(2/3)，还剩多少台．
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

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

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