Oda participated in the table tennis game in the city, and shook hands with every participating athlete once after the game. She shook hands a total of 7 times. How many athletes participated in the competition this time?
小田参加了市上的兵乓球赛，赛后和每个参赛的运动员都握了一次手，她一共握了7次手，这次参加比赛的有几名运动员？
<gadget id="calculator">7 + 1</gadget>
<output>8</output>

<result>8</result>