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_64008 ( "Serial No." real, "District" text, "Headquartered City" text, "City Population (2009)" real, "City Area(km 2 )" real )

### Question ###
What was the total city area for vehari city with a serial number bigger than 36?

### Accurate SQL ###

SELECT COUNT("City Area(km 2 )") FROM table_64008 WHERE "Headquartered City" = 'vehari city' AND "Serial No." > '36'