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곱셈: 3 x 21X7

1

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

2

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

3

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

4

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

5

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

6

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

7

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

8

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

9

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

10

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

11

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

12

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

13

		5	5	1
			2	0
				0
1	1	0	2	0
1	1	0	2	0

14

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

15

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

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