The cube with edge length a is placed in the shape shown in the figure. (1) try to find its surface area; (2) if it is placed in 10 layers, what is its surface area?

The cube with edge length a is placed in the shape shown in the figure. (1) try to find its surface area; (2) if it is placed in 10 layers, what is its surface area?

(1) The surface area is 6A2 + 12a2 + 18A2 = 36a2; (2) if 10 layers are placed in this way, the surface area is 6 × (1 + 2 +...) +10)a2=330a2.