When Xiaojun came home and was 300 meters away from the house, his sister and the puppy ran towards him together. The speed of Xiaojun and his sister was 50 meters per minute, while the speed of the puppy was 200 meters per minute. The puppy met Xiaojun Afterwards, it kept going back and forth between Xiaojun and his sister at the same speed. When Xiaojun and his sister were only 10 meters apart, how many meters did the puppy run in total?
小军回家离家门300米时，妹妹和小狗一起向他奔来，小军和妹妹的速度是50米一分钟，而小狗的速度是200米一分钟，小狗遇到小军后以同样的速度不停的往返于小军和妹妹之间，当小军与妹妹相距只有10米时，小狗一共跑了多少米？
<gadget id="calculator">300 - 10</gadget>
<output>290</output>

<gadget id="calculator">50 + 50</gadget>
<output>100</output>

<gadget id="calculator">290 / 100</gadget>
<output>29/10 = around 2.9</output>

<gadget id="calculator">(29/10) * 200</gadget>
<output>580</output>

<result>580</result>