There are 40 tables in the school cafeteria, and each table has 12 seats. 325 teachers and students eat in the cafeteria at the same time, each with one seat. How many more seats are there?
学校食堂有40张餐桌，每张餐桌有12个座位，325名师生在食堂同时用餐，每人一个座位，还多多少个座位？
<gadget id="calculator">12 * 40</gadget>
<output>480</output>

<gadget id="calculator">480 - 325</gadget>
<output>155</output>

<result>155</result>