A school held a sports meeting, in which female athletes accounted for (4/7) of the total number of athletes. Due to the requirements of the project, 4 more girls were added. At this time, girls accounted for (3/5) of the total athletes. How many athletes were there in total?
某学校举行运动会，其中女运动员占总运动员人数的(4/7)，由于项目的要求，又增加了4名女生，这时女生占总运动员的(3/5)，原来共有运动员多少名？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(3/5) / (2/5)</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">4 / 7</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">1 - (4/7)</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">(4/7) / (3/7)</gadget>
<output>4/3 = around 1.333333</output>

<gadget id="calculator">(3/2) - (4/3)</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">4 / (1/6)</gadget>
<output>24</output>

<gadget id="calculator">24 * (4/3)</gadget>
<output>32</output>

<gadget id="calculator">32 + 24</gadget>
<output>56</output>

<result>56</result>