Cars A and B start from places A and B, and drive toward each other. The first meeting is 75 kilometers away from place A. After meeting, they continue to drive and return immediately after reaching the end point. The second car is 75 kilometers away from place B. The first encounter, find the distance between A and B.
甲、乙两辆车从A、B两地出发，相向而行，第一次相遇距A地75千米，相遇后继续行进到达终点后又立即返回，在距B地75千米处第二次相遇，求A、B两地距离．
<gadget id="calculator">75 * 3</gadget>
<output>225</output>

<gadget id="calculator">225 - 75</gadget>
<output>150</output>

<result>150</result>