What is the total number of areas by square mile where the founding year was 1785, the county seat was in Spartanburg, and the land area by square mile was more than 811?
CREATE TABLE table_56571 (
    "County" text,
    "Year Founded" text,
    "County Seat" text,
    "2010 Census Population" real,
    "July 1, 2012 Population Estimate." real,
    "Area (Sq. Mi.)" real,
    "Land Area (Sq. Mi.)" real
)
SELECT SUM("Area (Sq. Mi.)") FROM table_56571 WHERE "Year Founded" = '1785' AND "County Seat" = 'spartanburg' AND "Land Area (Sq. Mi.)" > '811'
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: What is the total number of areas by square mile where the founding year was 1785, the county seat was in Spartanburg, and the land area by square mile was more than 811? ### Input: CREATE TABLE table_56571 (
    "County" text,
    "Year Founded" text,
    "County Seat" text,
    "2010 Census Population" real,
    "July 1, 2012 Population Estimate." real,
    "Area (Sq. Mi.)" real,
    "Land Area (Sq. Mi.)" real
) ### Response: SELECT SUM("Area (Sq. Mi.)") FROM table_56571 WHERE "Year Founded" = '1785' AND "County Seat" = 'spartanburg' AND "Land Area (Sq. Mi.)" > '811'