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

### Instruction:
 James anajenga jengo lenye ghorofa 20. Ghorofa 10 za kwanza zina urefu wa futi 12 kila moja. Ghorofa zilizobaki zina urefu wa futi 3 zaidi kila moja. Jengo lina urefu gani?


### Response:
 Ghorofa 10 za kwanza zina urefu wa 12*10=<<10*12=120>>120 futi.
Kuna ghorofa 20-10=<<20-10=10>>10 zilizobaki.
Kila ghorofa ina urefu wa 12+3=<<12+3=15>>15 futi.
Hivyo, ghorofa hizo zina urefu wa 15*10=<<15*10=150>>150 futi.
Jumla ya urefu ni 120+150=<<120+150=270>>270 futi.