1. (8 points) Calculate: $12+34 \times 15-78$, the result obtained is

保留源文本的换行和格式，直接输出翻译结果如下：

1. (8 points) Calculate: $12+34 \times 15-78$, the result obtained is
【Solution】Solution: $12+34 \times 15-78$
$$
\begin{array}{l}
=12+510-78 \\
=522-78 \\
=444
\end{array}
$$

Therefore, the answer is: 444.