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곱셈: 3 x 21X7

1

		1	7	4
			4	6
	1	0	4	4
	6	9	6	0
	8	0	0	4

2

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

3

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

4

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

5

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

6

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

7

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

8

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

9

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

10

		1	9	0
			4	6
	1	1	4	0
	7	6	0	0
	8	7	4	0

11

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

12

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

13

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

14

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

15

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

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