CREATE TABLE table_3155 ("Tie no" FLOAT, "Home team" TEXT, "Score 1" TEXT, "Away team" TEXT, "Attendance" FLOAT, "Date" TEXT)

When the away team is Millwall, what is the total possible amount of tie numbers?
SELECT COUNT("Tie no") FROM table_3155 WHERE "Away team" = 'Millwall'
SELECT COUNT("Tie no") FROM "table_3155" WHERE "Away team" = 'Millwall'