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곱셈 2자리 X 1자리

	2	2
		9
1	9	8

		1	6
			4
		6	4

		4	7
			2
		9	4

	7	0
		4
2	8	0

		2	0
			2
		4	0

	9	4
		6
5	6	4

		1	6
			3
		4	8

	8	8
		3
2	6	4

		1	7
			4
		6	8

	4	4
		6
2	6	4

		2	1
			4
		8	4

	3	8
		3
1	1	4

	9	2
		7
6	4	4

	8	4
		4
3	3	6

	7	5
		9
6	7	5