Context: CREATE TABLE table_name_65 (sales__billion_ INTEGER, headquarters VARCHAR, assets__billion_$_ VARCHAR)
Question: What is the average sales in billions of the company headquartered in France with more than 2,539.1 billion in assets?
Answer: SELECT AVG(sales__billion_) AS $_ FROM table_name_65 WHERE headquarters = "france" AND assets__billion_$_ > 2 OFFSET 539.1