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곱셈: 2 x 21X5

1

		1	5
		5	4
		6	0
	7	5	0
	8	1	0

2

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

3

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

4

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

5

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

6

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

7

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

8

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

9

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

10

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

11

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

12

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

13

		9	4
		3	1
		9	4
2	8	2	0
2	9	1	4

14

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

15

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

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