**Convert Square Meter to Acre - Unit Converter**
https://www.unitconverters.net/area/square-meter-to-acre.htm

Note that the square meter and its multiples and submultiples are squared, making a square decameter 10,000 times the size of a square meter even though a decameter is 100 times the size of a meter. Acre. Definition: An acre (symbol: ac) is a unit of land area used in the imperial and US customary systems. It is defined as the area of 1 chain ...

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