CREATE TABLE table_57132 ("Dep." CLOB, "Chief town" CLOB, "Arrondissement" CLOB, "Population  ( 1999 ) " CLOB, "Area  ( Square km ) " FLOAT, "Pop density" FLOAT, "Cantons" FLOAT, "Communes" FLOAT)

How many communes associated with over 10 cantons and an area (Square km) of 1,589?
SELECT AVG("Communes") FROM table_57132 WHERE "Cantons" > '10' AND "Area (Square km)" = '1,589'
SELECT AVG("Communes") FROM "table_57132" WHERE "Area (Square km)" = '1,589' AND "Cantons" > '10'