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곱셈: 2 x 21X4

1

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

2

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

3

		5	2
		1	0
			0
	5	2	0
	5	2	0

4

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

5

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

6

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

7

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

8

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

9

		1	2
		1	9
	1	0	8
	1	2	0
	2	2	8

10

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

11

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

12

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

13

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

14

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

15

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

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