To find the surface are, we can add up the area of all of the sides.
Top:
4in x 9in = 36in^2
Bottom:
4in x 9in = 36in^2
Front:
5in x 9 in = 45in^2
Back:
5in x 9 in = 45in^2
Right:
4in x 5in = 20in^2
Left:
4in x 5in = 20in^2
Adding them all together:
36+36+45+45+20+20 = 202in^2
The surface area of the prism is 1. 202 in^2