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곱셈: 2 x 21X9

1

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

2

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

3

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

4

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

5

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

6

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

7

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

8

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

9

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

10

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

11

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

12

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

13

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

14

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

15

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

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