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곱셈: 2 x 21X4

1

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

2

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

3

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

4

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

5

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

6

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

7

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

8

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

9

		5	0
		1	8
	4	0	0
	5	0	0
	9	0	0

10

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

11

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

12

		4	0
		9	1
		4	0
3	6	0	0
3	6	4	0

13

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

14

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

15

		5	0
		5	0
			0
2	5	0	0
2	5	0	0

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