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곱셈: 2 x 21X9

1

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

2

		2	1
		4	0
			0
	8	4	0
	8	4	0

3

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

4

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

5

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

6

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

7

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

8

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

9

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

10

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

11

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

12

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

13

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

14

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

15

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

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