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

### Instruction:
 Kuna stika 20 kwenye ukurasa. Ikiwa una kurasa 12 za stika lakini unapoteza ukurasa mmoja, basi utakuwa na stika ngapi?


### Response:
 Baada ya kupoteza ukurasa mmoja, utakuwa na kurasa 12 - 1 = <<12-1=11>>11 za stika.
Ikiwa kila ukurasa una stika 20, utakuwa na stika 11 x 20 = <<11*20=220>>220.