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곱셈: 2 x 21X7

1

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

2

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

3

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

4

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

5

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

6

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

7

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

8

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

9

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

10

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

11

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

12

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

13

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

14

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

15

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

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