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곱셈: 2 x 21X5

1

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

2

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

3

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

4

		3	7
		1	5
	1	8	5
	3	7	0
	5	5	5

5

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

6

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

7

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

8

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

9

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

10

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

11

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

12

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

13

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

14

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

15

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

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