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곱셈: 2 x 21X5

1

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

2

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

3

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

4

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

5

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

6

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

7

		1	0
		2	8
		8	0
	2	0	0
	2	8	0

8

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

9

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

10

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

11

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

12

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

13

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

14

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

15

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

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