The school held a parent-teacher meeting. There were 26 seats in each row, and there were 9 rows in total. After all the parents sat down, there were still 17 empty seats. How many parents attended the parent-teacher meeting?
学校召开家长会，会场每排有26个座位，总共有9排，家长们全部坐下后，还有17个座位空着，一共有多少个家长来参加家长会？
<gadget id="calculator">26 * 9</gadget>
<output>234</output>

<gadget id="calculator">234 - 17</gadget>
<output>217</output>

<result>217</result>