human
Considering the provided database schema and associated query, produce SQL code to retrieve the answer to the query. 
###Database Schema: Rank, Company, Headquarters, Industry, Sales (billion $), Profits (billion $), Assets (billion $), Market Value (billion $)
###Question: What is the market value of a company in billions that has 172.7 billion in sales? 
gpt
SELECT Market Value (billion $) FROM table WHERE Sales (billion $) = 172.7