The most common Korean word for “calculation” is 계산 (gyesan). 「calculation」는 한국어로 계산.
Learn 계산 free — flashcards, audio and review →「계산」 단어장으로 무료로 외우기Words and levels: TOPIK I essentials (National Institute of Korean Language standard curriculum, KOGL Type 1) · examples: Cheesepotato