CREATE TABLE table_17251764_1 (shire VARCHAR, area_in_km_2 VARCHAR)

how many shire in the land of area in km 2 is 27.17
SELECT COUNT(shire) FROM table_17251764_1 WHERE area_in_km_2 = "27.17"
SELECT COUNT("shire") FROM "table_17251764_1" WHERE "27.17" = "area_in_km_2"