The school held the "Welcome to the Olympics" calligraphy and painting competition. There were 15 more girls than boys. The result of the competition was that (3/4) girls won prizes, and all boys won prizes. The number of prizes for boys and girls was the same. How many boys participated?
学校举行"迎奥运"书画比赛，参赛的女生比男生多15人，比赛结果是女生有(3/4)获奖，男生全部获奖，男女生获奖人数相同，参赛的男生有多少人？
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 - (3/4)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">15 / (1/4)</gadget>
<output>60</output>

<gadget id="calculator">60 - 15</gadget>
<output>45</output>

<result>45</result>