How do I solve this word problem and what steps need to be taken?

Question

Write a polynomial function V(x) in factored form to represent the volume of soil in the frame.

Answer 1

Length: x + 2 + x + 2 + x + 2 + x = 4x + 6

Width: x + 2 + x + 2 + x = 3x + 4

Height: 3x

Volume = L•W•H = (4x + 6)(3x + 4)(3x)

V(x) = (4x + 6)(3x + 4)(3x)