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곱셈: 2 x 21X9

1

		1	9
		9	1
		1	9
1	7	1	0
1	7	2	9

2

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

3

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

4

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

5

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

6

		6	2
		1	1
		6	2
	6	2	0
	6	8	2

7

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

8

		2	6
		9	3
		7	8
2	3	4	0
2	4	1	8

9

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

10

		5	5
		4	4
	2	2	0
2	2	0	0
2	4	2	0

11

		9	6
		2	0
			0
1	9	2	0
1	9	2	0

12

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

13

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

14

		6	0
		4	9
	5	4	0
2	4	0	0
2	9	4	0

15

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

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