can someone help me with this? thank you!

Answer:
384 sq. ft.
Step-by-step explanation:
Surface Area
Surface Area formula:
A = 2(Width x Length) + 2(Length x Height) + 2(Height x Width)
Surface Area forumla applied:
A 2(9 x 12) + 2(12 x 4) + 2(4 x 9)
Your answer:
384 sq ft