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곱셈: 2 x 21X5

1

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

2

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

3

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

4

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

5

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

6

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

7

		1	9
		5	5
		9	5
	9	5	0
1	0	4	5

8

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

9

		9	7
		4	0
			0
3	8	8	0
3	8	8	0

10

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

11

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

12

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

13

		5	6
		3	0
			0
1	6	8	0
1	6	8	0

14

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

15

		1	0
		5	0
			0
	5	0	0
	5	0	0

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