You need the conversion factor for sq. ft. into sq. meters.
1 m. = 39.37 inches = 39.37/12 ft.
1 m2 = (39.37/12)2 ft2
So 1/((39.37/12)2) m2 = 1 ft2
For your problem,
6000 ft2 * 1 m2/(((39.37/12)2) ft2) should give you the area in square meters.
I get about 557.4 m2.