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곱셈: 2 x 21X5

1

		1	5
		4	4
		6	0
	6	0	0
	6	6	0

2

		7	4
		3	5
	3	7	0
2	2	2	0
2	5	9	0

3

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

4

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

5

		9	2
		8	1
		9	2
7	3	6	0
7	4	5	2

6

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

7

		7	9
		7	2
	1	5	8
5	5	3	0
5	6	8	8

8

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

9

		5	5
		5	8
	4	4	0
2	7	5	0
3	1	9	0

10

		1	0
		4	9
		9	0
	4	0	0
	4	9	0

11

		1	6
		9	3
		4	8
1	4	4	0
1	4	8	8

12

		1	8
		3	0
			0
	5	4	0
	5	4	0

13

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

14

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

15

		1	2
		2	0
			0
	2	4	0
	2	4	0

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