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곱셈: 2 x 13X4

		3	4
			2
		6	8

	2	8
		9
2	5	2

		2	2
			2
		4	4

	2	4
		9
2	1	6

		1	8
			2
		3	6

		1	1
			6
		6	6

		5	9
			1
		5	9

	3	0
		9
2	7	0

	5	0
		5
2	5	0

	5	1
		8
4	0	8

	2	5
		6
1	5	0

		1	2
			6
		7	2

		3	1
			1
		3	1

	1	2
		9
1	0	8

	7	1
		8
5	6	8