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곱셈: 2 x 12X4

		2	4
			4
		9	6

	4	8
		5
2	4	0

		3	1
			1
		3	1

	5	5
		2
1	1	0

	2	1
		5
1	0	5

		2	1
			2
		4	2

	3	8
		3
1	1	4

	3	5
		9
3	1	5

	3	9
		8
3	1	2

	6	0
		4
2	4	0

	4	7
		9
4	2	3

		1	1
			2
		2	2

	5	5
		5
2	7	5

	1	7
		6
1	0	2

		6	0
			1
		6	0