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

### Instruction:
 蒂莉在她的房子东边数了120颗星星，西边数了这个数的六倍。她一共数了多少颗星星？


### Response:
 首先找出她在西边看到的星星总数：120颗星星 * 6 = <<120*6=720>>720颗星星
然后将她在东边看到的数量加起来得到总数：720颗星星 + 120颗星星 = <<720+120=840>>840颗星星