Please solve the programming task below using a self-contained code snippet in a markdown code block.

Given an integer n (in base 10) and a base k, return the sum of the digits of n after converting n from base 10 to base k.
After converting, each digit should be interpreted as a base 10 number, and the sum should be returned in base 10.
 
Please complete the following python code precisely:
```python
class Solution:
    def sumBase(self, n: int, k: int) -> int:
```