Answer:
512 1/2 inch cubes
Explanation:
-In order to get 4 inches width, you will need 8 1/2 cubes (1/2 x 8 = 4)
-In order to get 4 inches height, you will need 8 1/2 cubes (1/2 x 8 = 4)
-In order to get 4 inches length, you will need 8 1/2 cubes (1/2 x 8 = 4)
8 length x 8 width x 8 height = 512 1/2 inch cubes to build a solid 4x4x4 inch cube.