user: Question: What is the sum of area with a population of 5615 and number more than 6?
Columns: ['Number', 'Name of administrative unit', 'Telephone (052)', 'Area (km 2 )', 'Population (people)']
Types: ['real', 'text', 'text', 'real', 'real']
Sample row: [1.0, 'Hoàn Lão township', '3862242', 5.42, 7247.0]
SQL:

assistant: SELECT SUM("Area (km 2 )") FROM "Table" WHERE "Population (people)" = 5615.0 AND "Number" > 6.0;