There are 48 students in Class 1 of the sixth grade, among which (1/4) participate in basketball games, (1/3) participate in volleyball games, and the rest participate in chess games. How many people participate in chess games?
六年级一班有48名同学，其中(1/4)的人参加篮球比赛，(1/3)的人参加排球比赛，剩下的参加棋类活动．参加棋类活动的有多少人？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">48 * (1/4)</gadget>
<output>12</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">48 * (1/3)</gadget>
<output>16</output>

<gadget id="calculator">48 - 12 - 16</gadget>
<output>20</output>

<result>20</result>