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곱셈: 2 x 21X9

1

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

2

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

3

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

4

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

5

		8	9
		2	1
		8	9
1	7	8	0
1	8	6	9

6

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

7

		5	5
		2	5
	2	7	5
1	1	0	0
1	3	7	5

8

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

9

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

10

		4	0
		5	8
	3	2	0
2	0	0	0
2	3	2	0

11

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

12

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

13

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

14

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

15

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

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