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곱셈: 2 x 21X7

1

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

2

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

3

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

4

		3	5
		5	1
		3	5
1	7	5	0
1	7	8	5

5

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

6

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

7

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

8

		4	5
		6	0
			0
2	7	0	0
2	7	0	0

9

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

10

		1	0
		4	0
			0
	4	0	0
	4	0	0

11

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

12

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

13

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

14

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

15

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

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