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곱셈: 2 x 21X9

1

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

2

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

3

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

4

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

5

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

6

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

7

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

8

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

9

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

10

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

11

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

12

		8	7
		4	4
	3	4	8
3	4	8	0
3	8	2	8

13

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

14

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

15

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

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