please help!! I really need help!

Answer:
432 in²
Step-by-step explanation:
6 sides
18x9=162
18x9=162
9x2=18
9x2=18
18x2=36
18x2=36
162+162+18+18+36+36=432 in²
Answer:
324
Step-by-step explanation:
Formula: L x W x H
L is 9
W is 18
H is 2
So the answer would be 324 in squared