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곱셈: 2 x 21X8

1

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

2

		2	5
		9	0
			0
2	2	5	0
2	2	5	0

3

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

4

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

5

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

6

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

7

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

8

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

9

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

10

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

11

		4	5
		2	1
		4	5
	9	0	0
	9	4	5

12

		4	2
		2	2
		8	4
	8	4	0
	9	2	4

13

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

14

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

15

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

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