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곱셈: 2 x 28X7

1

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

2

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

3

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

4

		7	8
		1	0
			0
	7	8	0
	7	8	0

5

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

6

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

7

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

8

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

9

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

10

		5	3
		7	0
			0
3	7	1	0
3	7	1	0

11

		3	6
		1	6
	2	1	6
	3	6	0
	5	7	6

12

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

13

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

14

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

15

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

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