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곱셈: 2 x 21X5

1

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

2

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

3

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

4

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

5

		2	9
		8	2
		5	8
2	3	2	0
2	3	7	8

6

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

7

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

8

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

9

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

10

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

11

		3	3
		1	8
	2	6	4
	3	3	0
	5	9	4

12

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

13

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

14

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

15

		9	1
		4	1
		9	1
3	6	4	0
3	7	3	1

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