How many times is the number of territories in "Eastern Region" than "Southern Region"?
"Eastern Region" refers to RegionDescription = 'Eastern'; "Southern Region" refers to RegionDescription = 'Southern'; times = divide(count(TerritoryDescription where RegionDescription = 'Eastern') , count(TerritoryDescription where RegionDescription = 'Southern'))
SELECT CAST(( SELECT COUNT(T1.TerritoryID) FROM Territories AS T1 INNER JOIN Region AS T2 ON T1.RegionID = T2.RegionID WHERE T2.RegionDescription = 'Eastern' ) AS REAL) / ( SELECT COUNT(T1.TerritoryID) FROM Territories AS T1 INNER JOIN Region AS T2 ON T1.RegionID = T2.RegionID WHERE T2.RegionDescription = 'Southern' ) AS Calu