CREATE TABLE table_22181 ("Season" FLOAT, "Average Attendance Home" TEXT, "Highest Attendance Home" TEXT, "Average Attendance Away" TEXT, "Highest Attendance Away" TEXT, "Division / Section" TEXT, "Level" TEXT, "Average Attendance League" TEXT)

When the home attendance is 3.123, what's the highest away attendance?
SELECT "Highest Attendance Away" FROM table_22181 WHERE "Average Attendance Home" = '3.123'
SELECT "Highest Attendance Away" FROM "table_22181" WHERE "Average Attendance Home" = '3.123'