What is the surface area and value of a prism that the height is 4 the width is 16 length is 4

Assuming the prisim is a rectangular prisim,
 surface area=area of 4 sides+2(area of top)

height=4
width is 16
legnth=4
asuming the side areas are 4 times 16, the total side area is 4 itmes 4 times 16 or 256

then the tops are 4 times 4 times 2=32

so the total surface area is 256+32=288 square units

Horizontal change or the change of x