1. (3 points) $20.16 \times 32 + 2.016 \times 680=$
【Solution】Solve: $20.16 \times 32+2.016 \times 680$
$$
\begin{array}{l}
=20.16 \times 32+20.16 \times 68 \\
=20.16 \times(32+68) \\
=20.16 \times 100 \\
=2016
\end{array}
$$

Therefore, the answer is: 2016.