For a piece of cloth, (1/2) is used to make clothes, and (1/3) is used to make bed sheets, what fraction of this cloth is left? (Only the column formula does not count)
一块布，做衣服用去这块布的(1/2)，做床单用去这块布的(1/3)，还剩这块布的几分之几？(只列式不计算)
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 - (1/2) - (1/3)</gadget>
<output>1/6 = around 0.166667</output>

<result>1/6 = around 0.166667</result>