CREATE TABLE table_name_20 (sales_area__m²_ INTEGER, sales_per_area VARCHAR(255), no_of_stores VARCHAR(255))
What is the smallest sales area (m²) that has €4,094/m² and more than 2 stores?
    
SQL: SELECT MIN(sales_area__m²_) FROM table_name_20 WHERE sales_per_area = "€4,094/m²" AND no_of_stores > 2