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

### Instruction:
Which Density per km² is the lowest one that has a Number (map) smaller than 13, and an Area in km² of 11.1?

### Inputs:
table_name: table, columns: ['Number (map)', 'Borough', 'Population Canada 2011 Census', 'Area in km²', 'Density per km²']

### Response:
SELECT MIN Density per km² FROM table WHERE Number (map) < 13 AND Area in km² = 11.1