CREATE TABLE table_39794 ("Position" FLOAT, "Team" TEXT, "Points" FLOAT, "Played" FLOAT, "Drawn" FLOAT, "Lost" FLOAT, "Against" FLOAT, "Difference" TEXT)

What is the average Position with less than 57 against and the team is Juventus?
SELECT AVG("Position") FROM table_39794 WHERE "Against" < '57' AND "Team" = 'juventus'
SELECT AVG("Position") FROM "table_39794" WHERE "Against" < '57' AND "Team" = 'juventus'