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

### Instruction:
 杰克逊的大儿子放学后得到4块饼干，小儿子得到2块饼干。如果一盒里有54块饼干，这盒饼干能够持续多少天？


### Response:
 杰克逊的儿子每天总共吃掉6块饼干。
所以，这盒饼干能够持续54块饼干 / 6块饼干 = <<54/6=9>>9天。