A piece of iron wire is 2m long, cut off the full length (1/2) for the first time, and cut off the full length (1/3) for the second time, what is the rest of the total length
一根铁丝长2m，第一次剪去全长的(1/2)，第二次剪去全长的(1/3)，剩下的占全长的多少
<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>