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

### Instruction:
 Southton wanazika kisanduku chao cha wakati futi 15 chini ya ardhi. Northton wanazika kisanduku chao cha wakati futi 12 juu zaidi ya mara 4 kina cha kisanduku cha wakati cha Southton. Kisanduku cha wakati cha Northton kimezikwa kina kiasi gani?


### Response:
 Kina cha kisanduku cha wakati cha Southton ni futi 15.
Kina cha kisanduku cha wakati cha Northton ni mara 4 * 15 + 12 = <<4*15+12=72>>72 futi.