Answer :

1^3 = 1 x 1 x 1 = 1 
2^3 = 2 x 2 x 2 = 8 
3^3 = 3 x 3 x 3 = 27 
4^3 = 4 x 4 x 4 = 64 
5^3 = 5 x 5 x 5 = 125