Carpet costs $12$12 per square yard. How much will it cost to carpet a room that is 180180 square feet?

The solution would be like this for this specific problem:

1 sq. yd = 9 sq. ft

180 sq. ft = 20 sq. yd

20 sq. yd * $12 = $240

So it will cost $240 to carpet a room that is 180 square feet.