1. (8 points) Expression: $2013 \times \frac{5.7 \times 4.2+\frac{21}{5} \times 4.3}{\frac{14}{73} \times 15+\frac{5}{73} \times 177+656}$ The calculation result is $\qquad$
【Solution】Solution: Numerator $=5.7 \times 4.2+4.2 \times 4.3$
$$
\begin{array}{l}
=4.2 \times(5.7+4.3) \\
=4.2 \times 10 \\
=42 \\
\text { Denominator }=\frac{14}{73} \times 15+\frac{5}{73} \times 3 \times 59+656 \\
=\frac{15}{73} \times 14+\frac{15}{73} \times 59+656 \\
=\frac{15}{73} \times(14+59)+656 \\
=\frac{15}{73} \times 73+656 \\
=15+656 \\
=617
\end{array}
$$
$$
\begin{array}{l}
2013 \times \frac{5.7 \times 4.2+\frac{21}{5} \times 4.3}{\frac{14}{73} \times 15+\frac{5}{73} \times 177+656} \\
=2013 \times \frac{42}{671} \\
=3 \times 42 \\
=126
\end{array}
$$

Therefore, the answer is: 126.