8. (3 points) A large cube, four medium cubes, and four small cubes are assembled into a three-dimensional figure as shown in the diagram. It is known that the edge lengths of the large, medium, and small cubes are 5 cm, 2 cm, and 1 cm, respectively. What is the surface area of this three-dimensional figure in square centimeters?
【Answer】Solution: According to the analysis, using the "compression" method, pressing everything above onto the top of the large cube, the total surface area $=$ the surface area of the large square + the side area of the medium cube + the side area of the small cube $=5 \times 5 \times 6+2 \times 2 \times 4 \times 4+1 \times 1 \times 4 \times 4=230$ square centimeters.

Therefore, the answer is: 230.