There are 8 children playing table tennis, each of them plays one game, how many games will they play in total?
8个小朋友打乒乓球比赛，每两人打一场，一共要打多少场比赛．
<gadget id="calculator">8 - 1</gadget>
<output>7</output>

<gadget id="calculator">7 / 2</gadget>
<output>7/2 = around 3.5</output>

<gadget id="calculator">8 * (7/2)</gadget>
<output>28</output>

<result>28</result>