Your hand calculator probably doesn't have enough digits.
The scientific calculator in windows (7) can do it.
Or ... paper and pencil.
what is 23897923 cubed
2 answers
Or the wonderful and powerful Wolfram
https://www.wolframalpha.com/input/?i=23897923%5E3
https://www.wolframalpha.com/input/?i=23897923%5E3