The ratio of the number of boys and girls participating in the first round of a selection competition is 4:3, the ratio of the number of boys and girls among all 91 people participating in the second round is 8:5, the ratio of the number of boys and girls eliminated in the first round It is 3:4, so how many students are there in the first round of competition?
参加某选拔赛第一轮比赛的男女生人数之比是4：3，所有参加第二轮比赛的91人中男女生人数之比是8：5，第一轮中被淘汰的男女生人数之比是3：4，那么第一轮比赛的学生共多少人．
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">(3/4) * 35</gadget>
<output>105/4 = around 26.25</output>

<gadget id="calculator">56 - (105/4)</gadget>
<output>119/4 = around 29.75</output>

<gadget id="calculator">(3/4) * 3</gadget>
<output>9/4 = around 2.25</output>

<gadget id="calculator">4 - (9/4)</gadget>
<output>7/4 = around 1.75</output>

<gadget id="calculator">(119/4) / (7/4)</gadget>
<output>17</output>

<gadget id="calculator">4 + 3</gadget>
<output>7</output>

<gadget id="calculator">17 * 7</gadget>
<output>119</output>

<result>119</result>