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곱셈: 2 x 21X7

1

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

2

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

3

		6	1
		1	8
	4	8	8
	6	1	0
1	0	9	8

4

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

5

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

6

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

7

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

8

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

9

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

10

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

11

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

12

		7	5
		9	2
	1	5	0
6	7	5	0
6	9	0	0

13

		8	0
		8	5
	4	0	0
6	4	0	0
6	8	0	0

14

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

15

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

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