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곱셈: 2 x 21X9

1

		1	9
		9	4
		7	6
1	7	1	0
1	7	8	6

2

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

3

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

4

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

5

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

6

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

7

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

8

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

9

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

10

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

11

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

12

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

13

		8	1
		7	4
	3	2	4
5	6	7	0
5	9	9	4

14

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

15

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

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