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곱셈: 2 x 12X5

		2	5
			1
		2	5

		1	0
			8
		8	0

		5	1
			1
		5	1

		2	7
			3
		8	1

		5	2
			1
		5	2

	6	4
		6
3	8	4

	6	9
		3
2	0	7

	5	8
		2
1	1	6

	2	8
		4
1	1	2

	5	8
		4
2	3	2

	7	0
		5
3	5	0

	7	5
		2
1	5	0

	2	0
		6
1	2	0

		2	6
			2
		5	2

		1	0
			2
		2	0