Perimeter and area
posted by Garrett on .
The gadget comes with a page of instructions. When page is unfolded, it is 81 square inches. If one page is nine inches wide what is the perimeter?

What is 9 times 9?

w = width = 9, L = length
Area = Lw
81 = 9L
L = 9
Perimeter P = 2w + 2L
w = 9, L = 9
P = 2(9) + 2(9)
P = ? 
Thanks,Helper.

the answer is i don't know and i need the answer