If you have a $5$ digit number that can be 0-9A-Za-z how would you represent that?
total_number_of_records = 5 digits * (10 + 26 + 26) ^ 5
I want to find out how many possible combinations you can come up with if you can use $0-9$, A-Z and lowercase A-Z for each digit in a $5$ digit number. Is that right?
Here is a picture of my calculator:
I've typed $62$ and now I want to increase the exponent to $5$.
Check your count. If each character (notice it's not really a number) can appear more than once, the total number of strings is simply $(10 + 26 + 26)^{5}.$ You do not need to multiply this result by $5$.