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곱셈: 2 x 21X4

1

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

2

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

3

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

4

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

5

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

6

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

7

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

8

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

9

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

10

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

11

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

12

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

13

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

14

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

15

		3	6
		1	3
	1	0	8
	3	6	0
	4	6	8

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