The first step is to understand what it means when a number has an exponent. The “power” of a number indicates how many times the base would be multiplied by itself to reach the correct value.
The second step is to write the number in the base-exponent form, and lastly calculate what the final result would be. Consider the example of 2 to the power of 4: in exponent form that would be
So re-applying these steps to our particular problem, we first convert our word problem to a base-exponent form of:
To simplify this, all that is needed is to multiply it out:
25 x 25 x 25 x 25 x ... (for a total of 90 times) = 652530446799852452671029410925654755570116425806896654775863645546972324459748622722289612685386828161426819860935211181640625
Therefore, 25 to the power of 90 is 652530446799852452671029410925654755570116425806896654775863645546972324459748622722289612685386828161426819860935211181640625.