Can you tell me the sum of Area km 2 that has the Official Name of glenelg?
CREATE TABLE table_77337 (
    "Official Name" text,
    "Status" text,
    "Area km 2" real,
    "Population" real,
    "Census Ranking" text
)
SELECT SUM("Area km 2") FROM table_77337 WHERE "Official Name" = 'glenelg'
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: Can you tell me the sum of Area km 2 that has the Official Name of glenelg? ### Input: CREATE TABLE table_77337 (
    "Official Name" text,
    "Status" text,
    "Area km 2" real,
    "Population" real,
    "Census Ranking" text
) ### Response: SELECT SUM("Area km 2") FROM table_77337 WHERE "Official Name" = 'glenelg'