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곱셈: 3 x 21X2

1

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

2

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

3

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

4

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

5

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

6

		3	4	4
			1	4
	1	3	7	6
	3	4	4	0
	4	8	1	6

7

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

8

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

9

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

10

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

11

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

12

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

13

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

14

		1	8	1
			6	0
				0
1	0	8	6	0
1	0	8	6	0

15

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

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