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곱셈: 2 x 21X9

1

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

2

		1	7
		2	6
	1	0	2
	3	4	0
	4	4	2

3

		9	5
		6	4
	3	8	0
5	7	0	0
6	0	8	0

4

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

5

		1	1
		1	9
		9	9
	1	1	0
	2	0	9

6

		6	3
		1	1
		6	3
	6	3	0
	6	9	3

7

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

8

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

9

		2	0
		4	2
		4	0
	8	0	0
	8	4	0

10

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

11

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

12

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

13

		1	1
		7	0
			0
	7	7	0
	7	7	0

14

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

15

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

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