Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
tell me the name of the capital with an area of 20,4.

### Inputs:
table_name: table, columns: ['car plates (since 1937)', 'Voivodeship Separate city', 'Capital', 'Area in 1000km² (1930)', 'Population in 1000 (1931)']

### Response:
SELECT Capital FROM table WHERE Area in 1000km² (1930) = 20,4