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곱셈: 2 x 21X9

1

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

2

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

3

		1	3
		3	1
		1	3
	3	9	0
	4	0	3

4

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

5

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

6

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

7

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

8

		8	1
		5	8
	6	4	8
4	0	5	0
4	6	9	8

9

		3	4
		5	2
		6	8
1	7	0	0
1	7	6	8

10

		9	9
		9	2
	1	9	8
8	9	1	0
9	1	0	8

11

		8	7
		2	3
	2	6	1
1	7	4	0
2	0	0	1

12

		1	5
		6	5
		7	5
	9	0	0
	9	7	5

13

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

14

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

15

		3	4
		9	1
		3	4
3	0	6	0
3	0	9	4

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