Cars A and B leave oppositely at the same time from east and west stations respectively. After meeting for the first time, car A travels 80 kilometers. The two cars continue to move forward at the original speed. When the two cars arrive at the station, they return immediately. The place where they meet for the second time is at 40 kilometers to the east of a meeting, how many kilometers are the distance between the east and west stations?
甲乙两车分别从东西两站同时相对开出，第一次相遇后，甲车行了80千米，两车继续以原来的速度前进，两车到站立即返回，第二次相遇地点在第一次相遇东侧40千米处，东西两站相距多少千米？
<gadget id="calculator">80 - 40</gadget>
<output>40</output>

<gadget id="calculator">40 + 80</gadget>
<output>120</output>

<gadget id="calculator">120 / 2</gadget>
<output>60</output>

<gadget id="calculator">60 + 80</gadget>
<output>140</output>

<result>140</result>