How big is Africa, and how many nations make up the continent?
Area can measure the size of countries; Country and nation share the same meaning
SELECT T1.Area, COUNT(T3.Name) FROM continent AS T1 INNER JOIN encompasses AS T2 ON T1.Name = T2.Continent INNER JOIN country AS T3 ON T3.Code = T2.Country WHERE T1.Name = 'Asia' GROUP BY T1.Name, T1.Area