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곱셈: 2 x 21X7

1

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

2

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

3

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

4

		9	3
		6	5
	4	6	5
5	5	8	0
6	0	4	5

5

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

6

		9	5
		1	8
	7	6	0
	9	5	0
1	7	1	0

7

		3	3
		9	1
		3	3
2	9	7	0
3	0	0	3

8

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

9

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

10

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

11

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

12

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

13

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

14

		6	3
		7	3
	1	8	9
4	4	1	0
4	5	9	9

15

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

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