(40+mouths)*25 Xiao Ming wrote 40+mouths*25, what is the difference between the correct answer and the wrong answer?
(40+口)*25小明写成了40+口*25，正确答案与错误答案相差多少？
<gadget id="calculator">1_000 - 40</gadget>
<output>960</output>

<result>960</result>