Two people go from A to B at the same speed. A travels to 16 kilometers first, and then B starts. When A arrives at B, he immediately returns to the original road and meets B at a distance (1/8) of the distance from B. , how many kilometers is the distance between A and B?
两人以同样的速度从A到B，甲先行到16千米处，乙才出发，当甲到达B后，立即照原路返回，行到距B是全程(1/8)处与乙相遇，问AB间相距多少千米？
<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">(1/8) * 2</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">16 / (1/4)</gadget>
<output>64</output>

<result>64</result>