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곱셈: 2 x 21X7

1

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

2

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

3

		2	7
		6	0
			0
1	6	2	0
1	6	2	0

4

		1	5
		4	5
		7	5
	6	0	0
	6	7	5

5

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

6

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

7

		1	3
		7	8
	1	0	4
	9	1	0
1	0	1	4

8

		4	2
		8	7
	2	9	4
3	3	6	0
3	6	5	4

9

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

10

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

11

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

12

		8	2
		1	1
		8	2
	8	2	0
	9	0	2

13

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

14

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

15

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

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