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곱셈: 3 x 21X7

1

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

2

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

3

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

4

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

5

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

6

		8	5	0
			3	4
	3	4	0	0
2	5	5	0	0
2	8	9	0	0

7

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

8

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

9

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

10

		3	4	7
			5	0
				0
1	7	3	5	0
1	7	3	5	0

11

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

12

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

13

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

14

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

15

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

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