CREATE TABLE table_64794 ("Week" FLOAT, "Date" TEXT, "Opponent" TEXT, "Result" TEXT, "Attendance" TEXT)

What is the Week of the game against Green Bay Packers?
SELECT AVG("Week") FROM table_64794 WHERE "Opponent" = 'green bay packers'
SELECT AVG("Week") FROM "table_64794" WHERE "Opponent" = 'green bay packers'