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

### Instruction:
How many different values of total power are there for the unit whose construction started on 01.03.1977 and whose commercial operation started on 01.02.1984?

### Inputs:
table_name: table, columns: ['Unit', 'Type', 'Net power', 'Total power', 'Construction start', 'Construction finish', 'Commercial operation', 'Shut down']

### Response:
SELECT COUNT Total power FROM table WHERE Construction start = 01.03.1977 AND Commercial operation = 01.02.1984