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_name_87 (area_km_2 VARCHAR, official_name VARCHAR)

### Question ###
What is the area in square kilometers of Studholm?

### Accurate SQL ###

SELECT COUNT(area_km_2) FROM table_name_87 WHERE official_name = "studholm"