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

### Instruction:
 John ameamua kununua ndege. Alipata dola 50 kutoka kwa kila babu yake 4. Ikiwa kila ndege inagharimu dola 20, ndege zote zilikuwa na mabawa mangapi?


### Response:
 Alipata dola 200 kwa sababu 4 x 50 = <<4*50=200>>200
Aliweza kununua ndege 10 kwa sababu 200 / 20 = <<200/20=10>>10
Ndege zina mabawa 20 kwa sababu 10 x 2 = <<10*2=20>>20