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곱셈: 2 x 21X5

1

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

2

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

3

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

4

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

5

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

6

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

7

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

8

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

9

		2	7
		2	1
		2	7
	5	4	0
	5	6	7

10

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

11

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

12

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

13

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

14

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

15

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

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