When the home attendance is 3.123, what's the highest away attendance?
CREATE TABLE table_1816947_2 (
    highest_attendance_away VARCHAR,
    average_attendance_home VARCHAR
)
SELECT highest_attendance_away FROM table_1816947_2 WHERE average_attendance_home = "3.123"
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: When the home attendance is 3.123, what's the highest away attendance? ### Input: CREATE TABLE table_1816947_2 (
    highest_attendance_away VARCHAR,
    average_attendance_home VARCHAR
) ### Response: SELECT highest_attendance_away FROM table_1816947_2 WHERE average_attendance_home = "3.123"