user: Question: How many miles (km) were driven when the average speed (mph) was 103.145?
Columns: ['Year', 'Date', 'Driver', 'Team', 'Manufacturer', 'Laps', 'Miles (km)', 'Race Time', 'Average Speed (mph)', 'Report']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [1993.0, 'July 11', 'Rusty Wallace', 'Penske Racing', 'Pontiac', '300', '317.4 (510.805)', '2:59:45', '105.947', 'Report']
SQL:

assistant: SELECT "Miles (km)" FROM "Table" WHERE "Average Speed (mph)" = '103.145';