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곱셈: 2 x 21X7

1

		1	7
		7	2
		3	4
1	1	9	0
1	2	2	4

2

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

3

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

4

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

5

		3	9
		8	6
	2	3	4
3	1	2	0
3	3	5	4

6

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

7

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

8

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

9

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

10

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

11

		5	9
		4	4
	2	3	6
2	3	6	0
2	5	9	6

12

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

13

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

14

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

15

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

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