Write SQL query to solve given problem: In the database, how many times is the number of Indian cities to the South African cities?. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT CAST(SUM(CASE WHEN T2.Country_Name = 'India' THEN 1 ELSE 0 END) AS REAL) / SUM(CASE WHEN T2.Country_Name = 'South Africa' THEN 1 ELSE 0 END) FROM City AS T1 INNER JOIN Country AS T2 ON T1.Country_Id = T2.Country_Id