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곱셈: 2 x 14X7

	4	7
		8
3	7	6

	5	9
		7
4	1	3

		1	4
			2
		2	8

	6	0
		6
3	6	0

		2	4
			1
		2	4

	4	8
		4
1	9	2

	6	0
		5
3	0	0

	9	4
		5
4	7	0

		3	1
			2
		6	2

	5	3
		7
3	7	1

		3	5
			1
		3	5

	5	9
		6
3	5	4

	2	0
		5
1	0	0

	2	3
		7
1	6	1

	5	5
		7
3	8	5