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곱셈: 2 x 21X7

1

		1	7
		5	3
		5	1
	8	5	0
	9	0	1

2

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

3

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

4

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

5

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

6

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

7

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

8

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

9

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

10

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

11

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

12

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

13

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

14

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

15

		9	5
		5	0
			0
4	7	5	0
4	7	5	0

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