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곱셈: 2 x 21X7

1

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

2

		8	2
		3	5
	4	1	0
2	4	6	0
2	8	7	0

3

		5	2
		5	5
	2	6	0
2	6	0	0
2	8	6	0

4

		4	3
		1	0
			0
	4	3	0
	4	3	0

5

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

6

		2	2
		3	3
		6	6
	6	6	0
	7	2	6

7

		5	5
		9	7
	3	8	5
4	9	5	0
5	3	3	5

8

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

9

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

10

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

11

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

12

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

13

		4	4
		7	7
	3	0	8
3	0	8	0
3	3	8	8

14

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

15

		4	4
		5	5
	2	2	0
2	2	0	0
2	4	2	0

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