CREATE TABLE table_78396 ("Week" FLOAT, "Date" TEXT, "Opponent" TEXT, "Result" TEXT, "Attendance" FLOAT)

When is the last week that has a result of a w 34-21?
SELECT MAX("Week") FROM table_78396 WHERE "Result" = 'w 34-21'
SELECT MAX("Week") FROM "table_78396" WHERE "Result" = 'w 34-21'