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곱셈: 2 x 21X7

1

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

2

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

3

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

4

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

5

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

6

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

7

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

8

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

9

		3	7
		9	5
	1	8	5
3	3	3	0
3	5	1	5

10

		2	3
		3	5
	1	1	5
	6	9	0
	8	0	5

11

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

12

		5	4
		5	7
	3	7	8
2	7	0	0
3	0	7	8

13

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

14

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

15

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

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