1. The calculation result of the expression $143 \times 21 \times 4 \times 37 \times 2$ is $\qquad$
\begin{aligned} \text { [Analysis] Original expression } & =11 \times 13 \times 3 \times 7 \times 4 \times 37 \times 2 \\ & =7 \times 11 \times 13 \times 3 \times 37 \times 4 \times 2 \\ & =1001 \times 111 \times 8 \\ & =888888\end{aligned}