user: Question: What is the total population of the district of klang, with an area larger than 636?
Columns: ['Rank', 'District', '2010 Population', 'Area (km 2 )', 'State']
Types: ['real', 'text', 'real', 'real', 'text']
Sample row: [1.0, 'Petaling', 1812633.0, 501.0, 'Selangor']
SQL:

assistant: SELECT SUM("2010 Population") FROM "Table" WHERE "District" = 'klang' AND "Area (km 2 )" > 636.0;