There are three concentric circles, the ratio of their radii is 3:4:5, if the area of the largest ring is 32 square centimeters, what is the area of the smallest circle in square centimeters?
有三个同心圆，它们的半径比是3：4：5，如果组成的最大的一个环形面积是32平方厘米，那么最小圆形面积是多少平方厘米．
<result>32</result>