"The decimilliare (dma, sometimes seen in cadastre area evaluation of real estate plots) is 1⁄10,000 are or one square decimetre. Such usage of a double prefix

"The decimilliare (dma, sometimes seen in cadastre area evaluation of real estate plots) is 1⁄10,000 are or one square decimetre. Such usage of a double prefix is non-standard. The decimilliare is roughly a four-inch-by-four-inch square."