A and B walk toward each other from two places 1100 meters apart. A walks 65 meters per minute, and B walks 75 meters per minute. After A starts 4 minutes, B starts to set off. B took a dog and set off with B at the same time. The dog ran towards A at a speed of 150 meters per minute. When it met A, it immediately turned back and ran towards B. After meeting B, it turned back and ran towards A until A, B The dog stopped when the two met. How many miles did the dog run in total?
甲、乙两人从相距1100米的两地相向而行，甲每分钟走65米，乙每分钟走75米，甲出发4分钟后，乙才开始出发．乙带了一只狗和乙同时出发，狗以每分钟150米的速度向甲奔去，遇到甲后立即回头向乙奔去，遇到乙后又回头向甲奔去，直到甲、乙两人相遇时狗才停止．这只狗共奔跑了多少路程？
<gadget id="calculator">65 * 4</gadget>
<output>260</output>

<gadget id="calculator">1_100 - 260</gadget>
<output>840</output>

<gadget id="calculator">65 + 75</gadget>
<output>140</output>

<gadget id="calculator">840 / 140</gadget>
<output>6</output>

<gadget id="calculator">6 * 150</gadget>
<output>900</output>

<result>900</result>