1. (5 points) Wang Yun calculated $325-\square \times 5$ by performing the subtraction first, resulting in 1500. What should the correct result be? $\qquad$ .
【Analysis】This is a problem type of "backtracking", solving from the end to the beginning. Since subtraction was calculated first, the original expression becomes $(325 - \square) \times 5 = 1500$, so $325 - \square = 1500 \div 5 = 300, \square = 325 - 300 = 25$, thus we know the number represented by the small square is $25, 325 - 25 \times 5 = 200$.

【Solution】Solution: $325 - (325 - 1500 \div 5) \times 5$,
$$
\begin{array}{l}
= 325 - 25 \times 5, \\
= 200 .
\end{array}
$$

Therefore, the answer is: 200