How many?

Square Feet

The square foot is an imperial unit and U.S. customary unit of area, used mainly in the United States. It is defined as the area of a square with sides of 1 foot. A standard tennis court is 78 feet x 36 feet, which means it is 2,808 square feet.

Hectares

The hectare is a non-SI metric unit of area equal to a square with 100-metre sides (1 hm2), or 10,000 m2, and is primarily used in the measurement of land. There are 100 hectares in one square kilometre. An acre is about 0.405 hectare and one hectare contains about 2.47 acres. Hacienda Nápoles, the luxurious ranch built by notorious drug lord Pablo Escobar, and which included a zoo complete with animals such as antelope, elephants, exotic birds, giraffes, hippopotamuses, ostriches, and ponies, was 1,500 hectares in size.