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

### Instruction:
Henry needs to declutter his book collection of 99 books.  From his bookshelf, he was able to fill 3 boxes of 15 books each to take to a donation center.  He had 21 books in a room he could donate, 4 on his coffee table and 18 cookbooks stashed in the kitchen.  When he dropped them off, he noticed a box of books that had a  "free to a good home" note.  He grabbed 12 books to take back to his place.  How many books does Henry now have?

### Response:
 Alizijaza masanduku 3 na vitabu 15 kila kimoja hivyo 3*15 = <<3*15=45>>45 vitabu
Kutoka sehemu nyingine za nyumba anatoa vitabu 45+18+4+21 = <<45+18+4+21=88>>88 kwa ajili ya kutoa misaada
Mkusanyiko wake una vitabu 99 na anatoa vitabu 88, hivyo anabakiwa na vitabu 99-88 = <<99-88=11>>11
Anachukua vitabu 12 kuongeza kwenye mkusanyiko wake wa vitabu 11 hivyo sasa ana vitabu 12+11 = <<12+11=23>>23