CREATE TABLE table_name_8 (area_km_2 VARCHAR(255), population_in_millions VARCHAR(255), member_state VARCHAR(255))
What is the total number of area km2 with a 4.2 population in millions and is a member state of the Czech Republic?
    
SQL: SELECT COUNT(area_km_2) FROM table_name_8 WHERE population_in_millions > 4.2 AND member_state = "czech republic"