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곱셈: 3 x 21X7

1

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

2

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

3

		1	1	1
			9	3
		3	3	3
	9	9	9	0
1	0	3	2	3

4

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

5

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

6

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

7

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

8

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

9

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

10

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

11

		1	4	7
			1	2
		2	9	4
	1	4	7	0
	1	7	6	4

12

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

13

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

14

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

15

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

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