12. (7 points) Tian Tian, while calculating “ $60+\square \times 5$ ”, performed the addition first, then the multiplication, and got a result of 500. Can you help him find the correct answer to this problem?
【Solution】Solve: $500 \div 5-60$
$$
\begin{array}{l}
=100-60 \\
=40 \\
60+40 \times 5 \\
=60+200 \\
=260 ;
\end{array}
$$

Answer: The correct result is 260.