How do you convert whole numbers into indices and standard form?

I am having trouble converting whole numbers into indices


For example (4^3)^5


i know that 4^3 is 64 and that 64^5 is 320


but i don't know how to convert 320 into an indice





i cant expain it very well but if anyone knows what im talking about, then please help me =(How do you convert whole numbers into indices and standard form?
64^5 isn't 320.





It is 1073741824, which is a big difference.





A way of simplifying (4^3)^5





Is by multiplying the two indices so you will get 4^15.How do you convert whole numbers into indices and standard form?
I dont really know what you meant but you can convert 320 into indices using this method:





http://i232.photobucket.com/albums/ee141鈥?/a>