Li Li and her 3 children participate in a table tennis match. Every two people will play one game. How many games will there be in total?
李丽和她的3个小朋友参加乒乓球比赛，每两人要赛一场，一共要赛多少场．
<gadget id="calculator">3 + 1</gadget>
<output>4</output>

<gadget id="calculator">4 - 1</gadget>
<output>3</output>

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

<gadget id="calculator">3 * 2</gadget>
<output>6</output>

<result>6</result>