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곱셈: 2 x 21X5

1

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

2

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

3

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

4

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

5

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

6

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

7

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

8

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

9

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

10

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

11

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

12

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

13

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

14

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

15

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

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