A and B are walking towards each other from A and B at the same time, and when they meet, they are 150 meters away from A; after meeting, they continue to move forward, return after reaching the destination, and meet again at a distance of 120 meters from A. What is the distance between A and B in meters?
甲乙两人同时从A、B两地相向而行，相遇时距A地150米；相遇后，他们继续前进，到达目的地后即返回，在距A地120米处再次相遇．求A、B两地的距离是多少米？
<gadget id="calculator">150 * 3</gadget>
<output>450</output>

<gadget id="calculator">450 + 120</gadget>
<output>570</output>

<gadget id="calculator">570 / 2</gadget>
<output>285</output>

<result>285</result>