Answer:
I have no clue
Step-by-step explanation:
If you like up the numbers vertically it makes it easier to answer the problem:
400,000,000
319,238,105
——————-
719,238,105
And because it is really just zeros it is a fairly simple problem :)
Please, Karla, explain what "C" and "n" represent. Are you talking about combinations (for example, n+2 objects taken n at a time? Or is C some kind of function? I don't quite see the relationship of this problem to 'data management.'