Two patrol teams, A and B, set off from the two outposts A and B at the same time, head towards each other, and meet for the first time at a distance of 9.6 kilometers from outpost A. After the encounter, the two patrols continued to advance at the original speed, and immediately returned at the same speed after arriving at the starting point of the other party. On the way back, they met again at a distance of 16.8 kilometers from the A post. Then, how many kilometers are there between the two outposts A and B?
甲、乙两支巡逻队从A、B两个哨所同时出发，相向而行，第一次在距A哨所9.6千米处相遇．相遇后两巡逻队仍以原速前进，并在到达对方出发地后立即按原速返回，返回途中又在距A哨所16.8千米处相遇．那么，A、B两哨所之间相距多少千米．
<gadget id="calculator">9.6 * 3</gadget>
<output>28.8</output>

<gadget id="calculator">28.8 + 16.8</gadget>
<output>45.6</output>

<gadget id="calculator">45.6 / 2</gadget>
<output>22.8</output>

<result>22.8</result>