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곱셈: 3 x 21X7

1

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

2

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

3

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

4

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

5

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

6

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

7

		5	4	0
			1	1
		5	4	0
	5	4	0	0
	5	9	4	0

8

		2	8	6
			1	0
				0
	2	8	6	0
	2	8	6	0

9

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

10

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

11

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

12

		1	2	5
			9	2
		2	5	0
1	1	2	5	0
1	1	5	0	0

13

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

14

		3	5	4
			6	4
	1	4	1	6
2	1	2	4	0
2	2	6	5	6

15

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

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