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곱셈: 2 x 21X7

1

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

2

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

3

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

4

		2	9
		9	2
		5	8
2	6	1	0
2	6	6	8

5

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

6

		1	9
		5	1
		1	9
	9	5	0
	9	6	9

7

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

8

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

9

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

10

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

11

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

12

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

13

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

14

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

15

		3	9
		5	0
			0
1	9	5	0
1	9	5	0

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