When a number is multiplied three times by itself, it becomes a perfect cube.

\begin{array}{lll}

\text { Number }(\mathbf{x}) & \multicolumn{1}{l}{\begin{array}{l}

\text { Multiplied Three times by } \\

\text { itself }

\end{array}} & \text { Cubes }\left(\mathbf{x}^3\right) \\

\hline 25 & 25 \times 25 \times 25 & 15625

\end{array}

So the cube of 25 is 15625.