A number of students are reading in the reading room, among whom (3/5) are male students. After leaving 5 male students, the male students in the reading room account for (4/7). How many students are reading in the reading room?
若干名同学在阅览室看书，其中男同学占(3/5)，走了5名男同学后，阅览室中的男同学占(4/7)，原来阅览室里一共有多少名同学看书？
<gadget id="calculator">4 / 7</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">(4/7) * 5</gadget>
<output>20/7 = around 2.857143</output>

<gadget id="calculator">5 - (20/7)</gadget>
<output>15/7 = around 2.142857</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">(3/5) - (4/7)</gadget>
<output>1/35 = around 0.028571</output>

<gadget id="calculator">(15/7) / (1/35)</gadget>
<output>75</output>

<result>75</result>