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곱셈: 3 x 21X7

1

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

2

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

3

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

4

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

5

		5	0	5
			2	4
	2	0	2	0
1	0	1	0	0
1	2	1	2	0

6

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

7

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

8

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

9

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

10

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

11

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

12

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

13

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

14

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

15

		5	1	0
			6	0
				0
3	0	6	0	0
3	0	6	0	0

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