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곱셈: 2 x 12X3

	2	3
		9
2	0	7

		2	1
			2
		4	2

	2	3
		7
1	6	1

	4	4
		9
3	9	6

	5	8
		4
2	3	2

		9	2
			1
		9	2

	8	8
		3
2	6	4

	7	6
		5
3	8	0

	7	5
		8
6	0	0

	1	2
		9
1	0	8

	6	5
		4
2	6	0

	5	6
		2
1	1	2

		4	9
			2
		9	8

		1	3
			5
		6	5

	6	0
		2
1	2	0