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곱셈: 2 x 21X5

1

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

2

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

3

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

4

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

5

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

6

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

7

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

8

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

9

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

10

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

11

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

12

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

13

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

14

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

15

		2	0
		5	9
	1	8	0
1	0	0	0
1	1	8	0

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