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곱셈: 2 x 21X8

1

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

2

		4	9
		2	0
			0
	9	8	0
	9	8	0

3

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

4

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

5

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

6

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

7

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

8

		9	2
		5	2
	1	8	4
4	6	0	0
4	7	8	4

9

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

10

		3	4
		5	6
	2	0	4
1	7	0	0
1	9	0	4

11

		4	6
		2	6
	2	7	6
	9	2	0
1	1	9	6

12

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

13

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

14

		3	8
		7	5
	1	9	0
2	6	6	0
2	8	5	0

15

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

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