user: Question: What is the total number of area km2 with a 4.2 population in millions and is a member state of the czech republic?
Columns: ['Member State', 'Population in millions', 'Population % of EU', 'Area km 2', 'Area % of EU', 'Pop. density People/km 2']
Types: ['text', 'real', 'text', 'real', 'text', 'real']
Sample row: ['European Union', 494.8, '100%', 4422773.0, '100%', 112.0]
SQL:

assistant: SELECT SUM("Area km 2") FROM "Table" WHERE "Population in millions" > 4.2 AND "Member State" = 'czech republic';