What is the average sales in billions of walmart, which has more than 15.7 billion in profits?
CREATE TABLE table_45130 (
    "Rank" real,
    "Company" text,
    "Headquarters" text,
    "Industry" text,
    "Sales (billion $)" real,
    "Profits (billion $)" real,
    "Assets (billion $)" real,
    "Market Value (billion $)" real
)
SELECT AVG("Sales (billion $)") FROM table_45130 WHERE "Company" = 'walmart' AND "Profits (billion $)" > '15.7'
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: What is the average sales in billions of walmart, which has more than 15.7 billion in profits? ### Input: CREATE TABLE table_45130 (
    "Rank" real,
    "Company" text,
    "Headquarters" text,
    "Industry" text,
    "Sales (billion $)" real,
    "Profits (billion $)" real,
    "Assets (billion $)" real,
    "Market Value (billion $)" real
) ### Response: SELECT AVG("Sales (billion $)") FROM table_45130 WHERE "Company" = 'walmart' AND "Profits (billion $)" > '15.7'