You can put this solution on YOUR website! Since there are 6 sides on a cube, the surface area of a cube can be calculated by multiplying area of one side times 6.
Where SA=Surface Area and s=side
This is the SA of one cube.
Since you have 8, multiple 24 by 8
This is only true of the 8 cubes are not touching on any surface.
If this is not the case or you want to understand another problem, please feel free to post another question or contact me through a thank you message.