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곱셈: 2 x 21X9

1

		1	9
		9	2
		3	8
1	7	1	0
1	7	4	8

2

		1	8
		3	1
		1	8
	5	4	0
	5	5	8

3

		8	3
		6	8
	6	6	4
4	9	8	0
5	6	4	4

4

		1	2
		3	1
		1	2
	3	6	0
	3	7	2

5

		6	4
		7	8
	5	1	2
4	4	8	0
4	9	9	2

6

		4	6
		9	4
	1	8	4
4	1	4	0
4	3	2	4

7

		5	9
		2	2
	1	1	8
1	1	8	0
1	2	9	8

8

		4	5
		4	2
		9	0
1	8	0	0
1	8	9	0

9

		6	7
		3	6
	4	0	2
2	0	1	0
2	4	1	2

10

		1	1
		2	0
			0
	2	2	0
	2	2	0

11

		2	1
		7	6
	1	2	6
1	4	7	0
1	5	9	6

12

		1	1
		6	0
			0
	6	6	0
	6	6	0

13

		2	5
		2	0
			0
	5	0	0
	5	0	0

14

		1	7
		2	8
	1	3	6
	3	4	0
	4	7	6

15

		3	6
		7	5
	1	8	0
2	5	2	0
2	7	0	0

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