When Cong Cong calculated (500-□)/25, he did not pay attention to the parentheses, and the result was 491. What is the correct number for this question.
聪聪在计算(500-□)/25时，没注意小括号，得到的结果是491．这道题的正确得数是多少．
<gadget id="calculator">500 - 491</gadget>
<output>9</output>

<gadget id="calculator">9 * 25</gadget>
<output>225</output>

<gadget id="calculator">500 - 225</gadget>
<output>275</output>

<gadget id="calculator">275 / 25</gadget>
<output>11</output>

<result>11</result>