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곱셈: 2 x 21X5

1

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

2

		1	3
		8	7
		9	1
1	0	4	0
1	1	3	1

3

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

4

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

5

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

6

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

7

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

8

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

9

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

10

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

11

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

12

		5	5
		8	8
	4	4	0
4	4	0	0
4	8	4	0

13

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

14

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

15

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

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