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

### Instruction:
Mr. Johnson has a prescription with enough pills for 30 days. After four-fifths of the days, he has 12 pills left. How many pills is Mr. Johnson supposed to take a day if he takes the same dose daily?

### Response:
 Bwana Johnson amekuwa akimeza vidonge kwa siku 30 * 4 / 5 = <<30*4/5=24>>24.
Ana siku 30 - 24 = <<30-24=6>>6 zilizobaki kumaliza vidonge.
Hivyo, anapaswa kumeza vidonge 12 / 6 = <<12/6=2>>2 kwa siku.