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곱셈: 2 x 21X4

1

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

2

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

3

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

4

		9	6
		4	0
			0
3	8	4	0
3	8	4	0

5

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

6

		8	2
		4	4
	3	2	8
3	2	8	0
3	6	0	8

7

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

8

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

9

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

10

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

11

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

12

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

13

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

14

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

15

		1	7
		6	1
		1	7
1	0	2	0
1	0	3	7

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