CREATE TABLE table_13897690_1 (area__sqmi_ VARCHAR2, area__km_2__ VARCHAR2)

How big (in sq mi) is the island that's 4065 km2?
SELECT area__sqmi_ FROM table_13897690_1 WHERE area__km_2__ = 4065
SELECT "area__sqmi_" FROM "table_13897690_1" WHERE "area__km_2__" = 4065