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

### Instruction:
A snake's head is one-tenth its length. If a snake is 10 feet long, calculate the length of the rest of its body minus the head.

### Response:
A snake's head is one-tenth its length, a tenth of 10 feet being 1 foot.
The rest of the body measures 10-1= <<10-1=9>>9 feet long.
#### 9