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곱셈: 3 x 21X5

1

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

2

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

3

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

4

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

5

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

6

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

7

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

8

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

9

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

10

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

11

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

12

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

13

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

14

		8	9	9
			5	4
	3	5	9	6
4	4	9	5	0
4	8	5	4	6

15

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

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