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곱셈: 2 x 21X7

1

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

2

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

3

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

4

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

5

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

6

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

7

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

8

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

9

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

10

		5	0
		6	6
	3	0	0
3	0	0	0
3	3	0	0

11

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

12

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

13

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

14

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

15

		7	7
		1	0
			0
	7	7	0
	7	7	0

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