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

### Instruction:
 Dave在现场演出时每晚会断2根吉他弦。如果他每周演出6场，连续演出12周，他需要更换多少根吉他弦？


### Response:
 Dave每晚断2根弦，一周断12根弦，所以在12周内，他需要更换12根弦 x 12周 = <<12*12=144>>144根吉他弦。