Xiao Ding rides a bicycle and Xiao Dong walks. The two start from A to B at the same time. After arriving at B, Xiao Ding returns immediately and meets Xiao Dong who is 2400 meters away from B. It is known that the speed of cycling is three times that of walking, how many meters is the distance between A and B?
小丁骑自行车，小冬步行，两人同时从甲地出发去乙地，小丁到达乙地后立即返回，在距乙地2400米处与迎面而来的小冬相遇．已知骑自行车的速度是步行的3倍，甲乙两地间的路程有多少米？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">2_400 * (1/3)</gadget>
<output>800</output>

<gadget id="calculator">800 + 2_400</gadget>
<output>3_200</output>

<gadget id="calculator">1 - (1/3)</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">3_200 / (2/3)</gadget>
<output>4_800</output>

<result>4_800</result>