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곱셈: 2 x 21X7

1

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

2

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

3

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

4

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

5

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

6

		5	0
		5	4
	2	0	0
2	5	0	0
2	7	0	0

7

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

8

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

9

		7	4
		6	0
			0
4	4	4	0
4	4	4	0

10

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

11

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

12

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

13

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

14

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

15

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

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