Table:
Stem	Leaf

4	0, 2, 4, 5

5	0, 7

6	1, 1, 6

7	2, 3, 8

8	3, 4, 5, 7, 8

Please ascertain the quantity of rows and columns within the provided table. The JSON format {"row_number": "m", "column_number": "n"} should be utilized to display the ultimate result.

There are 7 rows and 2 columns in the table. So, the final answer is {"row_number": "7", "column_number": "2"}.