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곱셈: 2 x 21X9

1

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

2

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

3

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

4

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

5

		6	0
		6	3
	1	8	0
3	6	0	0
3	7	8	0

6

		1	5
		3	3
		4	5
	4	5	0
	4	9	5

7

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

8

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

9

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

10

		9	4
		1	0
			0
	9	4	0
	9	4	0

11

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

12

		4	9
		1	9
	4	4	1
	4	9	0
	9	3	1

13

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

14

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

15

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

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