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곱셈: 2 x 13X7

	3	7
		6
2	2	2

	5	6
		9
5	0	4

	3	0
		4
1	2	0

	7	7
		5
3	8	5

	9	4
		6
5	6	4

		1	9
			1
		1	9

		9	2
			1
		9	2

		7	3
			1
		7	3

		2	5
			1
		2	5

		2	6
			2
		5	2

	8	7
		3
2	6	1

	7	6
		3
2	2	8

	6	1
		2
1	2	2

		2	1
			2
		4	2

	2	9
		8
2	3	2