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

### Instruction:
How many constructions has a Wheel arrange- ment of 4-4-0?

### Inputs:
table_name: table, columns: ['Builder', 'Construct- tion no.', 'Date ordered', 'Wheel arrange- ment', 's Cylinder', 'Engine weight', 'TC&StL no. (1883–84)']

### Response:
SELECT SUM Construct- tion no. FROM table WHERE Wheel arrange- ment = 4-4-0