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

### Instruction:
How many areas (km 2) have 151511 as the census 2006 population?

### Inputs:
table_name: table, columns: ['LGA Name', 'Area (km 2 )', 'Census 2006 population', 'Administrative capital', 'Postal Code']

### Response:
SELECT COUNT Area (km 2 ) FROM table WHERE Census 2006 population = 151511