A rope is (5/6) meters long, Xiao Ming has used up (2/3) of this rope, leaving ((())/(())) of this rope.
一条绳子长(5/6)米，小明用去了这条绳子的(2/3)，还剩下这条绳子的((())/(()))．
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

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

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