A rope, cut off its (1/6) for the first time, and half of the rope remains after the second cut.
一根绳子，第一次剪去它的(1/6)，第二次剪去多少后还剩下这根绳子的一半．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">(1/2) - (1/6)</gadget>
<output>1/3 = around 0.333333</output>

<result>1/3 = around 0.333333</result>