A is a unit of area used in Argentina and in many Central American countries, originally defined as 10,000 square in Spanish customary units. In other Spanish-speaking regions, the term has the meaning of a city block.
Today its size varies between countries:
If a is taken as 83.59 cm, then a of 10,000 square s is equal to 6,987.29 m<sup>2</sup>. In calculations, the approximate value of 7000 m<sup>2</sup> (or equivalently 0.7 ha) is often used to simplify conversion.