A school selects students from grades 2 to 6 to participate in a mathematics competition. There are 60 students who are not in grade 4, and 50 students who are not in grade 5. A total of 38 students from grades 4 and 5 participated. How many students in the fourth grade will participate in the competition?
某校选二到六年级同学参加数学竞赛，有60名不是四年级的，有50名不是五年级的，四、五年级共38名同学参赛．四年级有多少名同学参赛．
<gadget id="calculator">50 - 38</gadget>
<output>12</output>

<gadget id="calculator">60 + 12</gadget>
<output>72</output>

<gadget id="calculator">72 / 2</gadget>
<output>36</output>

<gadget id="calculator">50 - 36</gadget>
<output>14</output>

<result>14</result>