A cylinder and a cone have the same base diameter, the height of the cone is three times that of the cylinder, and the volume of the cone is 5 cubic decimeters. What is the volume of the cylinder?
一个圆柱和一个圆锥的底面直径相等，圆锥的高是圆柱的3倍，圆锥的体积是5立方分米，圆柱的体积是多少立方分米．
<result>5</result>