CREATE TABLE table_53931 ("Res." TEXT, "Record" TEXT, "Opponent" TEXT, "Method" TEXT, "Round" FLOAT, "Time" TEXT, "Location" TEXT)

What is the lowest round for Fort Lauderdale, Florida, United States, with a win and a time of 3:38?
SELECT MIN("Round") FROM table_53931 WHERE "Res." = 'win' AND "Location" = 'fort lauderdale, florida, united states' AND "Time" = '3:38'
SELECT MIN("Round") FROM "table_53931" WHERE "Location" = 'fort lauderdale, florida, united states' AND "Res." = 'win' AND "Time" = '3:38'