Table: land_area_population
Columns: municipality
shire
population
area_in_km_2
density_in_inhab_km_2
distance_to_san_sebastians_city_centre_in_km

Question: how many shire in the land of area in km 2 is 27.17
SQL: SELECT COUNT("shire") FROM land_area_population WHERE "area_in_km_2" = '27.17'