In the database, how many times is the number of Indian cities to the South African cities?
Indian refers to Country_Name = 'India'; South African refers to Country_Name = 'South Africa'; how many times = divide(count(City_Id where Country_Name = 'India'), count(City_Id where Country_Name = 'South Africa'))
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