There are 8 people in a team. After the game, each person shakes hands with the others once. How many handshakes are there in total?
一个球队有8个人，比赛完毕后每人都和其他人握一次手，一共握多少次手．
<gadget id="calculator">8 - 1</gadget>
<output>7</output>

<gadget id="calculator">8 / 2</gadget>
<output>4</output>

<gadget id="calculator">7 * 4</gadget>
<output>28</output>

<result>28</result>