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곱셈: 2 x 21X2

1

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

2

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

3

		5	4
		5	8
	4	3	2
2	7	0	0
3	1	3	2

4

		3	8
		8	5
	1	9	0
3	0	4	0
3	2	3	0

5

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

6

		7	3
		2	9
	6	5	7
1	4	6	0
2	1	1	7

7

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

8

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

9

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

10

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

11

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

12

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

13

		4	0
		8	5
	2	0	0
3	2	0	0
3	4	0	0

14

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

15

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

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