user: Question: What is the average area for code 98030 with population over 312?
Columns: ['Code', 'Type', 'Name', 'Area (km 2 )', 'Population', 'Regional County Municipality', 'Region']
Types: ['real', 'text', 'text', 'real', 'real', 'text', 'real']
Sample row: [95005.0, 'VL', 'Tadoussac', 74.59, 832.0, 'La Haute-Côte-Nord', 9.0]
SQL:

assistant: SELECT AVG("Area (km 2 )") FROM "Table" WHERE "Code" = 98030.0 AND "Population" > 312.0;