CREATE TABLE table_name_80 (attendance VARCHAR, opponent VARCHAR, venue VARCHAR)

What was the Attendance during the Home game where St. Johnstone was the Opponent?
SELECT COUNT(attendance) FROM table_name_80 WHERE opponent = "st. johnstone" AND venue = "home"
SELECT COUNT("attendance") FROM "table_name_80" WHERE "home" = "venue" AND "opponent" = "st. johnstone"