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_60 (area__km_2__ VARCHAR, common_of VARCHAR, population VARCHAR)

### Question ###
How much Area (km 2) has a Common of collegno, and a Population smaller than 50137?

### Accurate SQL ###

SELECT COUNT(area__km_2__) FROM table_name_60 WHERE common_of = "collegno" AND population < 50137