Cars A and B are traveling toward each other from AB at the same time, and meet at a distance of 70 kilometers from A. After meeting, the two vehicles continue to move forward at the same speed, return immediately after arriving at the destination, and meet for the second time at (2/5) the distance from B to AB. How many kilometers are there between A and B?
甲、乙两车同时从AB两地相向而行，在距A地70千米处相遇．相遇后两车继续以原速前进，到达目地的后马上返回，在距B地占AB两地路程的(2/5)处第二次相遇．A、B两地相距多少千米？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 + (2/5)</gadget>
<output>7/5 = around 1.4</output>

<gadget id="calculator">3 / (7/5)</gadget>
<output>15/7 = around 2.142857</output>

<gadget id="calculator">70 * (15/7)</gadget>
<output>150</output>

<result>150</result>