A table tennis singles match is held. There are a total of 6 players. If every 2 players play one game, how many games should be arranged in total?
举行乒乓球单打比赛，一共有6名运动员，如果每2人打一场，一共要安排多少场比赛．
<gadget id="calculator">6 - 1</gadget>
<output>5</output>

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

<gadget id="calculator">6 * (5/2)</gadget>
<output>15</output>

<result>15</result>