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곱셈: 2 x 21X5

1

		1	5
		4	0
			0
	6	0	0
	6	0	0

2

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

3

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

4

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

5

		8	5
		9	6
	5	1	0
7	6	5	0
8	1	6	0

6

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

7

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

8

		3	3
		3	3
		9	9
	9	9	0
1	0	8	9

9

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

10

		8	6
		4	0
			0
3	4	4	0
3	4	4	0

11

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

12

		5	8
		5	0
			0
2	9	0	0
2	9	0	0

13

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

14

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

15

		5	1
		4	1
		5	1
2	0	4	0
2	0	9	1

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