The distance between A and B is 140 kilometers. Xiao Ming has already ridden the whole journey (5/7) from A to B. How many kilometers will it take to reach B?
A、B两地相距140千米，小明从A地骑车到B地，已经骑了全程的(5/7)，再行多少千米就能到达B地？
<gadget id="calculator">5 / 7</gadget>
<output>5/7 = around 0.714286</output>

<gadget id="calculator">1 - (5/7)</gadget>
<output>2/7 = around 0.285714</output>

<gadget id="calculator">140 * (2/7)</gadget>
<output>40</output>

<result>40</result>