1. (5 points) $427 \div 2.68 \times 16 \times 26.8 \div 42.7 \times 16$.
【Solution】Solution: $427 \div 2.68 \times 16 \times 26.8 \div 42.7 \times 16$,
$$
\begin{array}{l}
=427 \times \frac{1}{2.68} \times 16 \times 26.8 \times \frac{1}{42.7} \times 16, \\
=\left(427 \times \frac{1}{42.7}\right) \times\left(26.8 \times \frac{1}{2.68}\right) \times(16 \times 16), \\
=10 \times 10 \times 256, \\
=25600 .
\end{array}
$$