 
 <translate> Give the step-by-step reasoning process and then the final answer. 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? <ibo> Kwuo otú e si atụgharị uche n'isiokwu ahụ, kọwaa nke ọ bụla n'ime ha, ma kwuo ihe bụ azịza ya. Ọ dị mkpa ka Henry dozie ebe nile o nwere akwụkwọ iri itoolu na itoolu. O si n'ebe ọ na-edebe akwụkwọ jupụta katọn 3 nke akwụkwọ 15 dị na nke ọ bụla ka o were gaa n'ebe a na-enye onyinye. O nwere akwụkwọ iri abụọ na otu n'otu ọnụ ụlọ ọ pụrụ inye n'onyinye, akwụkwọ anọ n'elu tebụl kọfị ya na akwụkwọ iri na asatọ e ji esi nri bụ́ ndị e zoro n'usekwu. Mgbe ọ na-enyefe ha, ọ hụrụ otu katọn akwụkwọ ndị e dere "n'efu nye ezi ụlọ". Ọ chịịrị akwụkwọ iri na abụọ gaa n'ụlọ ya. Akwụkwọ ole ka Henry nwere ugbu a? 