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곱셈: 2 x 21X7

1

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

2

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

3

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

4

		8	3
		1	1
		8	3
	8	3	0
	9	1	3

5

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

6

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

7

		3	5
		1	0
			0
	3	5	0
	3	5	0

8

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

9

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

10

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

11

		2	9
		8	3
		8	7
2	3	2	0
2	4	0	7

12

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

13

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

14

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

15

		1	0
		1	0
			0
	1	0	0
	1	0	0

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