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

### Instruction:
 Bert, Ernie, and Peggy collect stamps. Bert has four times as many stamps as Ernie, but Ernie has three times as many stamps as Peggy. If Peggy currently has 75 stamps in her collection, how many stamps does she need to add to her collection to have a collection as large as Bert's collection?


### Response:
 如果佩吉有75枚邮票，而厄尼有佩吉的三倍邮票，那么厄尼有3*75 = <<75*3=225>>225枚邮票。
由于伯特有厄尼的四倍邮票，那么伯特有4*225 = <<4*225=900>>900枚邮票。
因此，佩吉需要再增加900-75= <<900-75=825>>825枚邮票，才能拥有和伯特一样多的邮票。