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곱셈: 2 x 21X7

1

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

2

		3	6
		7	2
		7	2
2	5	2	0
2	5	9	2

3

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

4

		6	5
		4	4
	2	6	0
2	6	0	0
2	8	6	0

5

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

6

		1	9
		3	5
		9	5
	5	7	0
	6	6	5

7

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

8

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

9

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

10

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

11

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

12

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

13

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

14

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

15

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

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