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곱셈: 4 x 21X7

1

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

2

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

3

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

4

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

5

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

6

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

7

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

8

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

9

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

10

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

11

		4	5	9	2
				5	5
	2	2	9	6	0
2	2	9	6	0	0
2	5	2	5	6	0

12

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

13

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

14

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

15

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

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