A and B are walking toward each other from A and B at the same time, and meet at a distance of 72 kilometers from A. After meeting, the two continue to arrive at the starting point of each other at the original speed and then return. The second time is at a distance from A. They meet at 52 kilometers, so how many kilometers are the distance between AB and AB?
甲乙两人同时分别从A、B两地相向而行，在距离A地72千米的地方相遇，相遇后两人继续按原来的速度到达对方出发点后接着返回，第二次在距离A地的52千米处相遇，那么AB两地相距多少千米？
<gadget id="calculator">72 * 3</gadget>
<output>216</output>

<gadget id="calculator">216 + 52</gadget>
<output>268</output>

<gadget id="calculator">268 / 2</gadget>
<output>134</output>

<result>134</result>