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곱셈: 4 x 21X1

1

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

2

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

3

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

4

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

5

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

6

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

7

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

8

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

9

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

10

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

11

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

12

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

13

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

14

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

15

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

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