(2/6) of a piece of cloth is used to make a jacket, (1/6) is used to make trousers, how much of this piece of cloth is used to make the jacket and trousers? What fraction of the cloth is left?
一块布的(2/6)做上衣，(1/6)做裤子，做上衣和裤子一共用去这块布的几分之几？还剩下这块布的几分之几？
<gadget id="calculator">2 / 6</gadget>
<output>1/3 = around 0.333333</output>

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

<gadget id="calculator">(1/3) + (1/6)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 - (1/2)</gadget>
<output>1/2 = around 0.5</output>

<result>1/2 = around 0.5</result>