1. (5 points) Calculate: $222222 \div 2222 \times 6666=$
【Solution】Solve: $222222 \div 2222 \times 6666$
$$
\begin{array}{l}
=222222 \times(6666 \div 2222) \\
=222222 \times 3 \\
=666666
\end{array}
$$

Therefore, the answer is: 666666.