A certain elementary school held a mathematics competition. There were 30 more girls than boys. The result of the competition was that all the boys were excellent, and (1/4) of the girls were not good. A total of 75 boys and girls were good. How many students participated in this competition? Contest?
某小学举行数学竞赛，参加比赛的女生比男生多30人，比赛结果男生全部优良，女生有(1/4)没达到优良，男女生达到优良的共有75人，有多少名学生参加了这次比赛？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">30 * (1/4)</gadget>
<output>15/2 = around 7.5</output>

<gadget id="calculator">75 - 30</gadget>
<output>45</output>

<gadget id="calculator">(15/2) + 45</gadget>
<output>105/2 = around 52.5</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 + (3/4)</gadget>
<output>7/4 = around 1.75</output>

<gadget id="calculator">(105/2) / (7/4)</gadget>
<output>30</output>

<gadget id="calculator">30 + 30 + 30</gadget>
<output>90</output>

<result>90</result>