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곱셈: 2 x 21X7

1

		1	7
		1	1
		1	7
	1	7	0
	1	8	7

2

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

3

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

4

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

5

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

6

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

7

		1	4
		4	5
		7	0
	5	6	0
	6	3	0

8

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

9

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

10

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

11

		2	5
		3	2
		5	0
	7	5	0
	8	0	0

12

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

13

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

14

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

15

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

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