Write SQL query to solve given problem: What is the longitude of the island on which Mount Olympos is located?. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT T3.Longitude FROM mountain AS T1 INNER JOIN mountainOnIsland AS T2 ON T1.Name = T2.Mountain INNER JOIN island AS T3 ON T3.Name = T2.Island WHERE T1.Name = 'Olympos'