Cut off (1/3) meter from a rope, leaving (1/3) the full length. How long is this rope in meters?
一根绳子剪去(1/3)米，还剩全长的(1/3)．这根绳子原来长多少米米．
<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>