What is the total wins with less than 21 goals taken?
CREATE TABLE table_57977 (
    "Team" text,
    "Games Played" real,
    "Wins" real,
    "Losses" real,
    "Ties" real,
    "Goals For" real,
    "Goals Against" real
)
SELECT SUM("Wins") FROM table_57977 WHERE "Goals Against" < '21'
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 wins with less than 21 goals taken? ### Input: CREATE TABLE table_57977 (
    "Team" text,
    "Games Played" real,
    "Wins" real,
    "Losses" real,
    "Ties" real,
    "Goals For" real,
    "Goals Against" real
) ### Response: SELECT SUM("Wins") FROM table_57977 WHERE "Goals Against" < '21'