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곱셈: 2 x 21X8

1

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

2

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

3

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

4

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

5

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

6

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

7

		2	1
		2	0
			0
	4	2	0
	4	2	0

8

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

9

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

10

		6	3
		5	3
	1	8	9
3	1	5	0
3	3	3	9

11

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

12

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

13

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

14

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

15

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

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