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곱셈: 2 x 21X0

1

		1	0
		7	4
		4	0
	7	0	0
	7	4	0

2

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

3

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

4

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

5

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

6

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

7

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

8

		2	7
		1	0
			0
	2	7	0
	2	7	0

9

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

10

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

11

		9	4
		1	0
			0
	9	4	0
	9	4	0

12

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

13

		2	2
		4	0
			0
	8	8	0
	8	8	0

14

		1	3
		6	9
	1	1	7
	7	8	0
	8	9	7

15

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

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