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곱셈: 2 x 21X0

1

		1	0
		9	9
		9	0
	9	0	0
	9	9	0

2

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

3

		4	0
		2	2
		8	0
	8	0	0
	8	8	0

4

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

5

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

6

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

7

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

8

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

9

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

10

		5	7
		4	4
	2	2	8
2	2	8	0
2	5	0	8

11

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

12

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

13

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

14

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

15

		6	6
		1	3
	1	9	8
	6	6	0
	8	5	8

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