Nantoka/구구단gugudan구구단 (gugudan) is a Korean word meaning “multiplication table”.Meanings1multiplication tablePart of speechnounHanja九九段Related words구nine구nine구십ninety구십ninety구월September계단stairs단계phase교통수단means of transportation수단means구사일생narrow escape십중팔구almost all단락finishingStudy Korean with flashcards →