A car has traveled the whole distance (2/7) from place A to place B, and the remaining distance is much longer than the distance traveled.
一辆汽车从甲地开往乙地，已经行了全程的(2/7)，剩下的路程比已行的多全程的多少．
<gadget id="calculator">2 / 7</gadget>
<output>2/7 = around 0.285714</output>

<gadget id="calculator">1 - (2/7) - (2/7)</gadget>
<output>3/7 = around 0.428571</output>

<result>3/7 = around 0.428571</result>