A cuboid-shaped wooden block has dimensions 6 cm \(\times\) 4 cm \(\times\) 1 cm.
\(\bullet\) The two 4 cm \(\times\) 1 cm faces are coloured black.
\(\bullet\) The two 6 cm \(\times\) 1 cm faces are coloured red.
\(\bullet\) The two 6 cm \(\times\) 4 cm faces are coloured green.
The block is cut into small cubes of side 1 cm.
Question: How many cubes having red, green, and black colours on at least one side of the cube will be formed?