Let's split this up in sections. We have three sections. Left As you can tell, the side says 4 while the top says 3. 4×3 12 Middle If you can tell, the edge says 2 inches, so to find the side of the middle, we subtract. 4-2 2×3 6 Right It's the same as the left. 3×4 12 Let's add them together. 12+12+6 24+6 30 30 in²