Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_17251764_1 (shire VARCHAR, area_in_km_2 VARCHAR)

### Question ###
how many shire in the land of area in km 2 is 27.17

### Accurate SQL ###

SELECT COUNT(shire) FROM table_17251764_1 WHERE area_in_km_2 = "27.17"