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곱셈: 2 x 13X4

	3	4
		6
2	0	4

	3	7
		6
2	2	2

	5	9
		2
1	1	8

		8	6
			1
		8	6

	9	0
		2
1	8	0

	5	6
		2
1	1	2

	6	1
		7
4	2	7

	5	2
		4
2	0	8

	5	9
		9
5	3	1

		1	2
			1
		1	2

		5	2
			1
		5	2

		1	2
			8
		9	6

	4	8
		5
2	4	0

		2	8
			1
		2	8

		1	4
			2
		2	8