user: Question: Which area has a telephone of (052) of 3862279?
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 "Area (km 2 )" FROM "Table" WHERE "Telephone (052)" = '3862279';