Table schema:
CREATE TABLE table_1816947_2 (average_attendance_home VARCHAR, division___section VARCHAR, average_attendance_away VARCHAR)

Question: When the average away attendance is 1.889 in the Superettan, what's the average home attendance?
SQL: SELECT average_attendance_home FROM table_1816947_2 WHERE division___section = "Superettan" AND average_attendance_away = "1.889"