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곱셈: 4 x 21X4

1

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

2

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

3

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

4

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

5

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

6

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

7

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

8

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

9

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

10

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

11

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

12

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

13

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

14

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

15

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

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