Write SQL query to solve given problem: What is the average processed time of the solution with a repository of 254 likes, 88 followers, and 254 watchers?. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT CAST(SUM(T2.ProcessedTime) AS REAL) / COUNT(T2.ProcessedTime) FROM Repo AS T1 INNER JOIN Solution AS T2 ON T1.Id = T2.RepoId WHERE T1.Stars = 254 AND T1.Forks = 88 AND T1.Watchers = 254