For Ramona to know how much she expects to pay for the carpet she is ordering, she first needs to know how many square foot the the room has. In getting the area of the room, you multiply one side with the other, in equation,
19.5 ft x 41.6 ft = 811.2 sq ft.
Then if the carpet costs $9.50 per sq ft, you simply multiply it the area of the room in equation,
$9.50/ sq ft. x 811.2 sq ft, cancelling out the unit of sq ft the answer would be $7,706.4