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Base layer:The bottom-most layer consists of a 3×3 grid of cubes, totaling 3×3=9 cubes.

Middle layer:The middle layer consists of a2×2 grid of cubes, totaling 2×2=4 cubes.

Top layer:The top-most layer consists of a single cube, totaling 11 cubes.Total cubes:Adding the cubes from all layers:9 + 4 + 1 = 149+4+1=14