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곱셈: 2 x 15X2

	5	2
		4
2	0	8

	1	8
		6
1	0	8

	5	2
		2
1	0	4

		3	1
			2
		6	2

		4	5
			2
		9	0

		1	9
			5
		9	5

		1	7
			1
		1	7

	1	8
		9
1	6	2

	2	5
		8
2	0	0

	3	9
		6
2	3	4

	5	8
		8
4	6	4

	5	3
		4
2	1	2

		2	0
			1
		2	0

	8	7
		3
2	6	1

		4	1
			2
		8	2