1m = 3.3ft. 3m = 10ft. 3mx3m = 10ftx10ft = 100sqft. (appr. values) 3m^2 = 32sqft. The meant what they wrote. Only, they're idiots.
You might want to stop hurting your head with "math". ;-)
some people are good with math some are good with poetry some are great musicians ... we all have our strengths and weaknesses, maybe you can be a little more gracious to those who fall short of your strengths