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곱셈: 3 x 21X7

1

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

2

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

3

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

4

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

5

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

6

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

7

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

8

		6	0	1
			9	9
	5	4	0	9
5	4	0	9	0
5	9	4	9	9

9

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

10

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

11

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

12

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

13

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

14

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

15

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

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