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

### Instruction:
 Elizabeth has 10 reusable water bottles. She loses 2 water bottles at school. Then someone steals 1 of her water bottles at dance practice. To avoid any future theft of her water bottles, Elizabeth places 3 stickers on each of her remaining bottles. How many stickers does Elizabeth use in total on her water bottles?


### Response:
 Après avoir perdu 2 de ses bouteilles d'eau, Elizabeth a 10 - 2 - 1 = <<10-2-1=7>>7 bouteilles d'eau.
Pour éviter tout vol futur de ses bouteilles d'eau, Elizabeth place 3 autocollants sur chacune de ses bouteilles d'eau, utilisant un total de 3 * 7 = <<3*7=21>>21 autocollants.