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곱셈: 3 x 21X7

1

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

2

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

3

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

4

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

5

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

6

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

7

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

8

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

9

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

10

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

11

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

12

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

13

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

14

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

15

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

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