How big (square feet, square acres) is a hectare?

Question

I'm reading a book, and they use the measurement with no reference point to the size ... I'm 57 and no longer have the math books to figure it out by myself. Any help will be appreciated. Thanks!

Answer 1

A hectare are 100 x 100 meters, roughly 2.2 acres or 270.000 square foot.

Answer 2

One hectare = 2.47 acres = 10000 sq. meters or 107600 sq. feet.