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곱셈: 2 x 21X8

1

		1	8
		6	5
		9	0
1	0	8	0
1	1	7	0

2

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

3

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

4

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

5

		7	0
		9	1
		7	0
6	3	0	0
6	3	7	0

6

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

7

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

8

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

9

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

10

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

11

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

12

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

13

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

14

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

15

		8	9
		1	9
	8	0	1
	8	9	0
1	6	9	1

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