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

### Instruction:
 Jessica给她的姑姑写了一封长信，需要贴邮票寄出。她用了8张纸，每张纸重1/5盎司，她的信封重2/5盎司。她需要每盎司贴一张邮票。Jessica需要多少张邮票才能寄出她的信？


### Response:
 Jessica的纸重8 * 1/5 = 8/5盎司。
因此，她的纸和信封一共重8/5 + 2/5 = 10/5 = <<8/5+2/5=2>>2盎司。
因此，她需要2张邮票才能寄出她的信。