Database: formula_1
Question: What is the average lap time for Lewis Hamilton in the 2009 Malaysian Grand Prix?
SQL: SELECT AVG(T2.milliseconds) FROM races AS T1 INNER JOIN lapTimes AS T2 ON T2.raceId = T1.raceId INNER JOIN drivers AS T3 ON T3.driverId = T2.driverId WHERE T3.forename = 'Lewis' AND T3.surname = 'Hamilton' AND T1.year = 2009 AND T1.name = 'Malaysian Grand Prix'