Two swimming teams set off at the same time from A and B, which are 2040 meters apart. Team A swims 40 meters per minute from the groundwater of A, and team B swims 45 meters per minute from the groundwater of B. A steamboat is responsible for the safety of the two teams. At the same time, start from B, run 1200 meters per minute, return immediately when you meet team A, and drive to team A when you meet team B when you return, so how many meters does the motorboat travel before the two teams meet?
两个游泳队同时从相距2040米的A、B两地相向出发，甲队从A地下水，每分钟游40米，乙队从B地下水，每分钟游45米，一只汽船负责两队的安全，同时从B地出发，每分钟行使1200米，遇到甲队就立即返回，返回遇到乙队又向甲队开出，这样不断的往返下去，汽艇行使了多少米两队才能相遇？
<gadget id="calculator">45 + 40</gadget>
<output>85</output>

<gadget id="calculator">2_040 / 85</gadget>
<output>24</output>

<gadget id="calculator">1_200 * 24</gadget>
<output>28_800</output>

<result>28_800</result>