The distance between A and B is 1500 meters. A and B start at the same time and walk towards each other. A walks 70 meters per minute, and B walks 80 meters per minute. A also takes a dog with him. The speed of the dog is 200 meters per minute. When meeting B, turn around and run towards A, and then turn around and run towards B until A and B meet. When A and B meet, how many meters did the dog run in total?
甲乙两家相距1500米，甲乙同时出发相向而行，甲每分钟走70米，乙每分钟走80米，甲还带着一条狗，狗的速度是每分钟200米，狗与甲一起出发，遇到乙时就掉头向甲跑，遇到甲再掉头向乙跑，直到甲乙两人相遇，求甲乙两人相遇时，狗一共跑了多少米？
<gadget id="calculator">70 + 80</gadget>
<output>150</output>

<gadget id="calculator">1_500 / 150</gadget>
<output>10</output>

<gadget id="calculator">200 * 10</gadget>
<output>2_000</output>

<result>2_000</result>