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_2071644_2 ( weight__kg_m_ VARCHAR, cross_section_area__cm_2__ VARCHAR )

### Question ###
If the cross-section area is 21.2, what is the weight?

### Accurate SQL ###

SELECT weight__kg_m_ FROM table_2071644_2 WHERE cross_section_area__cm_2__ = "21.2"