Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_1816947_2 (highest_attendance_away VARCHAR, average_attendance_home VARCHAR)
### Question:
When the home attendance is 3.123, what's the highest away attendance?
### Answer:
SELECT highest_attendance_away FROM table_1816947_2 WHERE average_attendance_home = "3.123"