and B travel from the East Village to the West Village at the same speed. After A has walked 12 kilometers, B starts to walk. After A arrives at the West Village, he returns immediately and meets B at a place (2/5) away from the West Village. How many meters are there between the East and West villages?
甲、乙两人以同样的速度从东村到西村，甲走了12千米以后，乙开始走，甲到西村后立即返回，在距西村全程的(2/5)的地方与乙相遇．东、西两村相距多少米？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(2/5) * 2</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">12 / (4/5)</gadget>
<output>15</output>

<result>15</result>