A, B, and C start from A to B at the same time. A, B turn back to A after arriving at B, and after the U-turn, the speed decreases to half of their original speed. A is the first to turn around, and after the U-turn, he meets B head-on at C. At this time, C has traveled 2010 meters; So, what is the distance between AB and AB?
甲、乙、丙三人同时从A出发去B，甲、乙到B后调头回A，并且调头后速度减少到各自原来速度的一半．甲最先调头，调头后与乙在C迎面相遇，此时丙已行2010米；甲又行一段后与丙在AB中点D迎面相遇；乙调头后也在C与丙迎面相遇．那么，AB间路程是多少米．
<gadget id="calculator">4 / 1</gadget>
<output>4</output>

<gadget id="calculator">2_010 * 4</gadget>
<output>8_040</output>

<gadget id="calculator">8_040 / 1.5</gadget>
<output>5_360</output>

<result>5_360</result>