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곱셈: 2 x 21X1

1

		1	1
		4	7
		7	7
	4	4	0
	5	1	7

2

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

3

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

4

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

5

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

6

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

7

		1	4
		1	0
			0
	1	4	0
	1	4	0

8

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

9

		1	5
		6	4
		6	0
	9	0	0
	9	6	0

10

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

11

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

12

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

13

		5	5
		3	4
	2	2	0
1	6	5	0
1	8	7	0

14

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

15

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

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