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

### Instruction:
 Hifadhi ya eneo la karibu ina njiwa 70 ambao wanaita hifadhi nyumbani. Nusu ya njiwa ni weusi, na asilimia 20 ya njiwa weusi ni wa kiume. Kuna njiwa weusi wa kike wangapi zaidi kuliko njiwa weusi wa kiume?


### Response:
 Njiwa weusi: 70/2=<<70/2=35>>35
Njiwa weusi wa kiume: 35(.20)=7
35-7=<<35-7=28>>28
Kuna njiwa weusi wa kike 28-7=<<28-7=21>>21 zaidi