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

### Instruction:
 A楼有4层，比B楼少9层。C楼比B楼的层数少6层的五倍。C楼有多少层？


### Response:
 A楼有4层
B楼有4 + 9 = <<4+9=13>>13层
C楼有5 * 13 - 6 = 59层