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

### Instruction:
In a field of 500 clovers, 20% have four leaves and one quarter of these are purple clovers. Assuming these proportions are exactly correct, how many clovers in the field are both purple and four-leaved?

### Response:
 20% ya shamba ni makarafuu yenye majani manne, hii inamaanisha kuna 500/5= <<500/5=100>>100 makarafuu yenye majani manne
100/4= <<100/4=25>>25 kati ya hizi ni makarafuu ya zambarau yenye majani manne