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

### Instruction:
 Anna anasoma kitabu chenye sura 31, lakini anaruka sura zote ambazo zinaweza kugawanywa na 3. Ikiwa inamchukua dakika 20 kusoma kila sura, anatumia muda gani jumla kusoma?


### Response:
 Kuna sura 31 / 3 = <<31/3=10.333>>10 sura zinazoweza kugawanywa na 3.
Kuna sura 31 - sura 10 = <<31-10=21>>21 ambazo Anna anasoma.
Inamchukua dakika 20 * sura 21 = <<20*21=420>>420 dakika kusoma kitabu.
Kwa kuwa kuna dakika 60 katika saa, anatumia dakika 420 / dakika 60 = <<420/60=7>>7 masaa kusoma kitabu.