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

### Instruction:
How many numbers have the product code of 2.6?

### Inputs:
table_name: table, columns: ['#', 'Original title', 'Directed by', 'Written by', 'Original airdate', 'Prod. code']

### Response:
SELECT # FROM table WHERE Prod. code = 2.6