How do i find the surface area of each rectangular prism?

A=2(wl+hl+hw)
w=width
h=height
l=length

To find the surface area of a rectangular prism, you find the area of one side and multiply it by to. Do that for three different sides. For example:
L=2
W=3
H=4
2 x 3=6 x 2=12
3 x 4=12 x 2=24
2 x 4=8 x 2=16
Add them up and you should get the answer. The answer to the example is 52.
You could also use the formula of:
A= 2(wl+hl+hw)