Database: mondial_geo
Question: Which nation, with a population ranging from 60,000,000 to 99,000,000, has the greatest gross domestic product?
SQL: SELECT T1.Name, T2.GDP FROM country AS T1 INNER JOIN economy AS T2 ON T1.Code = T2.Country WHERE T1.Population BETWEEN 60000000 AND 90000000 ORDER BY T2.GDP DESC LIMIT 1