A 10-meter-long iron wire, its (1/2) is used up for the first time, and its (1/3) is used up for the second time, what fraction of the total length is left?
一根10米长的铁丝，第一次用去它的(1/2)，第二次用去它的(1/3)，还剩下全长的几分之几？
<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>