The school holds a table tennis selection competition. Each contestant has to compete with other athletes. There are a total of 5 athletes. How many games will there be in total?
学校进行乒乓球选拔赛，每个参赛选手都要和其他运动员比赛一场，一共有5个运动员，一共要比赛多少场？
<gadget id="calculator">5 - 1</gadget>
<output>4</output>

<gadget id="calculator">5 / 2</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">4 * (5/2)</gadget>
<output>10</output>

<result>10</result>