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

### Instruction:
 如果斯图有9本书，而阿尔伯特有斯图的4倍书，斯图和阿尔伯特总共有多少本书？


### Response:
 阿尔伯特有9*4 = <<9*4=36>>36本书。
所以，他们总共有36本书 + 9本书 = <<36+9=45>>45本书。