A rope (5/6) meters, use up (1/6), how many meters are left.
一根绳子(5/6)米，用去它的(1/6)，剩下多少米．
<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

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

<gadget id="calculator">1 - (1/6)</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">(5/6) * (5/6)</gadget>
<output>25/36 = around 0.694444</output>

<result>25/36 = around 0.694444</result>