3. As shown in the figure, four rectangular strips of paper, each 16 cm long and 2 cm wide, are placed vertically intersecting on a flat surface. The area of the table covered is ( )
A. $72 \mathrm{~cm}^{2}$
B. $128 \mathrm{~cm}^{2}$
C. $124 \mathrm{~cm}^{2}$
D. $112 \mathrm{~cm}^{2}$
3. Solution: $16 \times 2 \times 4 - 2 \times 2 \times 4 = 112\left(\mathrm{~cm}^{2}\right)$ Answer: D