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곱셈: 2 x 13X4

	3	4
		5
1	7	0

		4	6
			2
		9	2

	7	1
		3
2	1	3

		1	2
			7
		8	4

	4	2
		7
2	9	4

		6	0
			1
		6	0

	2	7
		6
1	6	2

		1	5
			3
		4	5

	6	0
		8
4	8	0

	6	9
		2
1	3	8

		2	6
			2
		5	2

	6	2
		4
2	4	8

		1	1
			2
		2	2

		2	8
			1
		2	8

	4	7
		3
1	4	1