There are eight rows of seats in the school meeting room, each row has 25 seats. There are 154 parents attending the parent-teacher meeting, how many are still available?
学校会议室有八排座位，每排有25个座位．有154位家长参加家长会，请问还有多少个是空的？
<gadget id="calculator">25 * 8</gadget>
<output>200</output>

<gadget id="calculator">200 - 154</gadget>
<output>46</output>

<result>46</result>