Xiao Ming and Xiao Dong travel from A to B at the same speed. Xiao Ming travels for a certain distance before Xiao Dong sets off. Xiao Ming travels another 30 kilometers to B and immediately returns along the original road. 1/5) met Xiaodong. How many kilometers are there between A and B?
小明和小东以同样的速度从甲地到乙地，小明先行了一段路后，小东才出发，小明又行了30千米到乙地，立即沿原来的路返回，行到全程的(1/5)处和小东相遇．甲、乙两地相距多少千米？
<gadget id="calculator">0.8 - 0.2</gadget>
<output>0.6</output>

<gadget id="calculator">30 / 0.6</gadget>
<output>50</output>

<result>50</result>