만 and the four-digit groups
English groups big numbers in threes: thousand, million, billion.
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This day covers 만, 오만, 십만 [심만], 백만 [뱅만], 천만, 일억, 150만
Open to everyone right now: days 1 to 3 of this course, the whole Hangul course, the Hangul chart, all 559 vocabulary words, the grammar reference, the 14 situation guides, the review deck and the printable charts.