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

### Instruction:
In what division was there a population density in km2 of 1,604.3 in 2011?

### Inputs:
table_name: table, columns: ['Administrative division', 'Area (km²) 2011**', 'Population 2001 Census (Adjusted)', 'Population 2011 Census (Adjusted)', 'Population density (/km² 2011)']

### Response:
SELECT Administrative division FROM table WHERE Population density (/km² 2011) = 1,604.3