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곱셈: 2 x 21X2

1

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

2

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

3

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

4

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

5

		2	0
		2	5
	1	0	0
	4	0	0
	5	0	0

6

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

7

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

8

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

9

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

10

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

11

		7	2
		8	4
	2	8	8
5	7	6	0
6	0	4	8

12

		8	3
		5	2
	1	6	6
4	1	5	0
4	3	1	6

13

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

14

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

15

		6	0
		5	3
	1	8	0
3	0	0	0
3	1	8	0

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