Hello there! Sometimes geometry can be a little tricky aha.
Here's the surface area equation for a rectangular prism:
A=2(wl+hl+hw)
Where:
w = width
l = length
h = height
So for this, just plug in the numbers
A = 2 [ ( 13 x 14 ) + ( 5 x 14 ) + ( 5 x 13 ) ]
A = 2 ( 182 + 70 + 65 )
A = 2 ( 317 )
A = 634 u (u stands for units since I do not know what the units are)
I hoped this helped! If you have any more questions just comment or message!
