Well, honey, 18 x 20 equals 360 square feet. So, if you're looking to cover that area with some snazzy new carpet, you better make sure you have enough square footage to work with. Just don't go tripping over those numbers while you're at it!
It is: 20 times 20 = 400 square feet
800 square feet (40 x 20 = 800).
600 square feet
If the numbers are in feet then 86 times 20 = 1720 square feet
200 square feet
360.
20
A 20' x 18' ceiling comprises 33.45 (33.4450944) square meters.
A simple rectangular room 20 feet by 18 feet has 360 square feet.
18 ft X 20 ft = 360 Square feet
18*20 = 360 square feet
The answer is 33.55 sqm
18 feet is 5.4864 meters (says google, just type "18 feet in meters") 20 feet is 6.09600 meters 5.4864 * 6.09600 = 33.4450944 meters squared (AKA square meters).
20 x 20 = 400 square feet.
400 square feet.
Do you mean a real square with the side length of 20 feet? Then 20 feet times 20 feet is 400 square feet.
400 square feet