A total of 20 pots of flowers are placed around a circular fountain for a week, and the distance between each two pots of flowers is 8 decimeters. Find the perimeter of the pool.
在一个圆形喷水池边的一周共放了20盆鲜花，每两盆鲜花之间相距8分米，求这个水池的周长．
<gadget id="calculator">20 * 8</gadget>
<output>160</output>

<result>160</result>