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곱셈: 2 x 14X7

	4	7
		4
1	8	8

	5	6
		4
2	2	4

		2	9
			1
		2	9

	4	4
		6
2	6	4

		1	9
			3
		5	7

	4	7
		6
2	8	2

	2	2
		5
1	1	0

	4	0
		4
1	6	0

		2	5
			2
		5	0

		1	0
			2
		2	0

	1	7
		6
1	0	2

	2	6
		4
1	0	4

		1	1
			2
		2	2

		2	4
			4
		9	6

	5	4
		6
3	2	4