At 12:00 noon, Lele came home after school at a speed of 60 meters per minute. At the same time, his father took the Benben dog to pick up Lele at a speed of 100 meters per minute. He went to find Lele at a high speed, and immediately went back to look for his father when he saw Lele, and went back to look for Lele immediately when he saw his father, and so on. It is known that the distance between Lele’s home and the school is 2,400 meters, so how many meters did Benbengou run when Dad picked up Lele?
中午12点，乐乐放学后以每分钟60米的速度回家，同时爸爸带着奔奔狗从家出发以每分钟100米的速度去接乐乐，一出家门奔奔狗便以每分钟150米的速度去找乐乐，见到乐乐后又立即返回找爸爸，见到爸爸又立即返回找乐乐，如此下去．已知乐乐家离学校的距离是2400米，那么当爸爸接上乐乐，奔奔狗一共跑了多少米？
<gadget id="calculator">60 + 100</gadget>
<output>160</output>

<gadget id="calculator">2_400 / 160</gadget>
<output>15</output>

<gadget id="calculator">150 * 15</gadget>
<output>2_250</output>

<result>2_250</result>