2•2•2•2

The expression \(2 \cdot 2 \cdot 2 \cdot 2\) can be simplified as follows:

\[ 2 \cdot 2 = 4 \]

\[ 4 \cdot 2 = 8 \]

\[ 8 \cdot 2 = 16 \]

So, \(2 \cdot 2 \cdot 2 \cdot 2 = 16\).

Alternatively, you can express it as \(2^4\), which is also equal to 16.