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곱셈: 2 x 21X5

1

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

2

		1	0
		1	2
		2	0
	1	0	0
	1	2	0

3

		3	5
		3	3
	1	0	5
1	0	5	0
1	1	5	5

4

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

5

		6	5
		4	6
	3	9	0
2	6	0	0
2	9	9	0

6

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

7

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

8

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

9

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

10

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

11

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

12

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

13

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

14

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

15

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

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