After the surface of a cube with a side length of 5 decimeters is painted with paint, it is cut into 125 small cubes with a side length of 1 decimeter on average. Among the small cubes cut, how many pieces are painted on three sides?
将一个棱长5分米的正方体木块表面涂上油漆后，平均切成125个棱长1分米的小正方体，在切成的小正方体中，三面涂色的有多少块．
<result>8</result>