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곱셈: 2 x 21X2

1

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

2

		7	9
		3	3
	2	3	7
2	3	7	0
2	6	0	7

3

		2	2
		8	6
	1	3	2
1	7	6	0
1	8	9	2

4

		5	7
		6	1
		5	7
3	4	2	0
3	4	7	7

5

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

6

		1	0
		1	8
		8	0
	1	0	0
	1	8	0

7

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

8

		4	4
		2	6
	2	6	4
	8	8	0
1	1	4	4

9

		1	1
		5	2
		2	2
	5	5	0
	5	7	2

10

		8	2
		7	6
	4	9	2
5	7	4	0
6	2	3	2

11

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

12

		9	9
		1	8
	7	9	2
	9	9	0
1	7	8	2

13

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

14

		2	0
		6	2
		4	0
1	2	0	0
1	2	4	0

15

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

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