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

### Instruction:
Peter has 15 birds. 1/3 are ducks. The rest are chickens and require special feed that costs $2 per bird. How much does it cost to feed the chickens?

### Response:
 2/3 ya ndege ni kuku kwa sababu 1 -(1/3)=2/3
Ana kuku 10 kwa sababu 15 x (2/3) =<<15*(2/3)=10>>10
Itagharimu $20 kuwalisha kuku kwa sababu 10 x 2=<<10*2=20>>20