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

### Instruction:
What is the Diameter (mi) when the Longitude is 79.8° e?

### Inputs:
table_name: table, columns: ['Gill', 'Latitude', 'Longitude', 'Diameter (km)', 'Diameter (mi)']

### Response:
SELECT Diameter (mi) FROM table WHERE Longitude = 79.8° e