The siblings are traveling together. The younger brother takes the first step and walks 40 meters per minute. After walking 80 meters, the older sister chases him. The older sister walks 60 meters per minute, and the puppy with the older sister runs 150 meters per minute. The puppy caught up with the younger brother and turned to look for the older sister. When it met the older sister, it turned to chase the younger brother. It ran around like this until the younger brother met the puppy. How many meters did the puppy run in total?
姐弟俩出游，弟弟先一步，每分钟走40米，走了80米后姐姐去追他，姐姐每分钟走60米，姐姐带的小狗每分钟跑150米．小狗追上了弟弟又转去找姐姐，碰上了姐姐又转去追弟弟，这样跑来跑去，直到弟弟相遇小狗才停下来．问小狗共跑了多少米？
<gadget id="calculator">60 - 40</gadget>
<output>20</output>

<gadget id="calculator">80 / 20</gadget>
<output>4</output>

<gadget id="calculator">4 * 150</gadget>
<output>600</output>

<result>600</result>