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곱셈: 2 x 21X8

1

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

2

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

3

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

4

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

5

		4	5
		1	0
			0
	4	5	0
	4	5	0

6

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

7

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

8

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

9

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

10

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

11

		2	5
		2	9
	2	2	5
	5	0	0
	7	2	5

12

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

13

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

14

		3	5
		8	2
		7	0
2	8	0	0
2	8	7	0

15

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

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