A rope is (4/5) meters long, first cut off (1/4), then subtract (1/4) meters, how many meters are left.
一条绳子长(4/5)米，先剪去它的(1/4)，再减去(1/4)米，还剩多少米．
<gadget id="calculator">11 / 20</gadget>
<output>11/20 = around 0.55</output>

<result>11/20 = around 0.55</result>