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

### 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:
 Elizabeth ana chupa 10 za maji.
Anapoteza chupa 2 shuleni.
Kisha anapoteza chupa 1 zaidi kwenye mazoezi ya kucheza.
Sasa ana chupa 10 - 2 - 1 = <<10-2-1=7>>7 za maji.
Anaweka stika 3 kwenye kila chupa 7 za maji.
Hivyo anatumia stika 3 * 7 = <<3*7=21>>21.