CREATE TABLE table_24673 ("State Rank by Revenue" FLOAT, "Company Name" TEXT, "National Rank" FLOAT, "Revenue  ( $billions )  2012 estimate" TEXT, "Headquarters City" TEXT, "Known for" TEXT)

Where is the company with estimated revenue of 33.3 billion headquartered?
SELECT "Headquarters City" FROM table_24673 WHERE "Revenue ($billions) 2012 estimate" = '33.3'
SELECT "Headquarters City" FROM "table_24673" WHERE "Revenue ($billions) 2012 estimate" = '33.3'