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곱셈: 3 x 21X5

1

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

2

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

3

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

4

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

5

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

6

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

7

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

8

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

9

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

10

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

11

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

12

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

13

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

14

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

15

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

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