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곱셈: 2 x 21X2

1

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

2

		7	3
		2	6
	4	3	8
1	4	6	0
1	8	9	8

3

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

4

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

5

		7	4
		6	5
	3	7	0
4	4	4	0
4	8	1	0

6

		3	0
		2	2
		6	0
	6	0	0
	6	6	0

7

		5	1
		7	8
	4	0	8
3	5	7	0
3	9	7	8

8

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

9

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

10

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

11

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

12

		4	5
		9	0
			0
4	0	5	0
4	0	5	0

13

		5	9
		8	3
	1	7	7
4	7	2	0
4	8	9	7

14

		4	6
		4	3
	1	3	8
1	8	4	0
1	9	7	8

15

		2	2
		1	5
	1	1	0
	2	2	0
	3	3	0

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