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곱셈: 2 x 21X5

1

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

2

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

3

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

4

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

5

		4	5
		3	4
	1	8	0
1	3	5	0
1	5	3	0

6

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

7

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

8

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

9

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

10

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

11

		2	5
		8	5
	1	2	5
2	0	0	0
2	1	2	5

12

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

13

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

14

		2	5
		9	2
		5	0
2	2	5	0
2	3	0	0

15

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

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