Rope A is (2/7) meters longer than Rope B, how much shorter is Rope B than Rope A?
甲绳比乙绳长(2/7)米，乙绳比甲绳短多少米
<gadget id="calculator">2 / 7</gadget>
<output>2/7 = around 0.285714</output>

<result>2/7 = around 0.285714</result>