How many?

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.

Acres

The acre is a unit of land area used in the imperial and US customary systems. Based upon the International yard and pound agreement of 1959, an acre may be declared as exactly 4,046.8564224 square metres. For context, the area of a baseball field is around 3 acres.