A total of 42 students participated in the chorus and dance in the "June 1st" festival this year. Among them, 38 students participated in the chorus and 26 students participated in the dance. How many students participated in both.
今年"六•一"节共有42名学生参加大合唱和舞蹈，其中参加大合唱的有38人，参加舞蹈的有26人，这两样都参加的有多少人．
<gadget id="calculator">26 - 42</gadget>
<output>-16</output>

<gadget id="calculator">38 + (-16)</gadget>
<output>22</output>

<result>22</result>