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곱셈: 2 x 21X9

1

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

2

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

3

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

4

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

5

		4	8
		6	0
			0
2	8	8	0
2	8	8	0

6

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

7

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

8

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

9

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

10

		5	2
		9	4
	2	0	8
4	6	8	0
4	8	8	8

11

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

12

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

13

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

14

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

15

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

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