2,5*2,5*2,5

The calculation of \(2.5 \times 2.5 \times 2.5\) can be simplified as follows:

First, calculate \(2.5 \times 2.5\):

\[ 2.5 \times 2.5 = 6.25 \]

Next, multiply that result by \(2.5\):

\[ 6.25 \times 2.5 = 15.625 \]

So, \(2.5 \times 2.5 \times 2.5 = 15.625\).