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곱셈: 3 x 21X7

1

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

2

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

3

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

4

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

5

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

6

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

7

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

8

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

9

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

10

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

11

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

12

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

13

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

14

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

15

		9	1	0
			9	2
	1	8	2	0
8	1	9	0	0
8	3	7	2	0

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