One
Multiply the two numbers together. That would be 180 square feet.
$20.80
18' X 16' = 288sq ft 288 sq ft / 9 = 32 sq yds 32 sq yds X $0.65 = $20.80
1 yard = 3 foot so 16 foot by 18 foot = 51/3 x 6 yard carpet 51/3 x 6 = 32 square yards of carpet. At 0.65 per square yard this is 0.65 x 20.80 per square yard.