piece of rope, cut off (1/3) of the full length, leaving (1/3) meter. How long is this rope in meters?
一条绳子，剪去全长的(1/3)，还剩(1/3)米．这条绳子全长多少米？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 - (1/3)</gadget>
<output>2/3 = around 0.666667</output>

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

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