Below is an instruction that describes a task. Write a response that appropriately completes the request in English. Please answer in English.

### Instruction:
Jimmy decides to make sandwiches for a picnic.  He makes 8 sandwiches in total, using two slices of bread each.  How many packs of bread does he need to buy to make these sandwiches, assuming he starts with no bread and each pack has 4 slices of bread in it?

### Response:
He needs 2 * 8 = <<2*8=16>>16 slices of bread.
Each pack has 4 slices of bread, so he needs 16 / 4 = <<16/4=4>>4 packs of bread.
#### 4

