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_203_834 ( id number, "rank" number, "census subdivision" text, "province" text, "type" text, "land area\n(km2, 2011)" number, "population 2011" number, "population 2006" number, "population 2001" number, "population 1996" number, "change in % 2006-2011" number, "change in % 1996-2011" number )

### Question ###
what is the combined land area of toronto and hamilton ?

### Accurate SQL ###

SELECT SUM("land area\n(km2, 2011)") FROM table_203_834 WHERE "census subdivision" IN ('toronto', 'hamilton')