There are 76 students in the fourth grade, of which 13 girls and half of the boys participate in the mathematics competition, and the remaining boys and girls are equal in number. How many more boys than girls are there in this grade?
四年级有学生76人，其中13名女生与男生的一半参加数学竞赛，剩下的男女生数相等，这个年级的男生比女生多多少人？
<gadget id="calculator">76 - 13</gadget>
<output>63</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 - (1/2)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(1/2) + 1</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">63 / (3/2)</gadget>
<output>42</output>

<gadget id="calculator">76 - 42</gadget>
<output>34</output>

<gadget id="calculator">42 - 34</gadget>
<output>8</output>

<result>8</result>