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곱셈: 2 x 21X5

1

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

2

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

3

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

4

		2	1
		2	0
			0
	4	2	0
	4	2	0

5

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

6

		5	2
		4	2
	1	0	4
2	0	8	0
2	1	8	4

7

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

8

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

9

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

10

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

11

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

12

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

13

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

14

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

15

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

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