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

### Instruction:
Milton has some books about zoology and 4 times as many books about botany. If he has 80 books total, how many zoology books does he have?

### Response:
 Hebu tuchukue z kuwa idadi ya vitabu vya zoology na b kuwa idadi ya vitabu vya botany. Tunajua kwamba z + b = 80 na b = 4z.
Tukibadilisha equation ya pili katika equation ya kwanza, tunapata z + 4z = 80
Tukichanganya vipengele kama, tunapata 5z = 80
Tukigawanya pande zote mbili kwa 5, tunapata z = 16