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곱셈: 2 x 21X7

1

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

2

		3	3
		1	0
			0
	3	3	0
	3	3	0

3

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

4

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

5

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

6

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

7

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

8

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

9

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

10

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

11

		5	5
		4	5
	2	7	5
2	2	0	0
2	4	7	5

12

		5	7
		5	0
			0
2	8	5	0
2	8	5	0

13

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

14

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

15

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

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