Because it is a square all 4 sides will be the same length.
To find the length of the side of a square, find the square root of the area:
Side length = √324
Side length = 18 cm.
The perimeter of the pillow is the side length times 4:
18 x 4 = 72 cm.
The lace is sold for $0.98 for every 2 cm.
Divide total cm by 2, then multiply that by the cost:
72 / 2 = 36
36 x 0.98 = $35.28
