When Yaya came home from school, when she was 360 meters away from the house, her younger sister and the puppy ran towards her together from the door. Yaya’s speed was 65 meters per minute, her sister’s speed was 55 meters per minute, and the puppy’s speed was 180 meters per minute, the puppy returns after meeting Yaya, and travels back and forth between Yaya and her sister at the same speed until they meet. How many meters did the puppy run in total?
丫丫放学回家，在距家门360米时，妹妹和小狗从家门一起向她奔来，丫丫的速度是每分钟65米，妹妹的速度是每分钟55米，小狗的速度是每分钟180米，小狗遇到丫丫后返回，这样以同样的速度往返于丫丫和妹妹之间，直到两人相遇为止．这只小狗一共跑了多少米？
<gadget id="calculator">65 + 55</gadget>
<output>120</output>

<gadget id="calculator">360 / 120</gadget>
<output>3</output>

<gadget id="calculator">3 * 180</gadget>
<output>540</output>

<result>540</result>