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_48639 ( "Official Name" text, "Status" text, "Area km 2" real, "Population" real, "Census Ranking" text )

### Question ###
Saint-Jacques has what as the area km 2?

### Accurate SQL ###

SELECT "Area km 2" FROM table_48639 WHERE "Official Name" = 'saint-jacques'