dance troupe originally had 400 students, and the ratio of female students to male students was 9:16. After recruiting another group of female students, male students accounted for 40% of the total. How many students does the dance troupe have now?
某舞蹈团原有学员400名，其中女学员与男学员人数的比是9﹕16，又招收一批女学员后，男学员占总数的40%，现在舞蹈团有学员多少人？
<gadget id="calculator">9 + 16</gadget>
<output>25</output>

<gadget id="calculator">16 / 25</gadget>
<output>16/25 = around 0.64</output>

<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(16/25) / (2/5)</gadget>
<output>8/5 = around 1.6</output>

<gadget id="calculator">400 * (8/5)</gadget>
<output>640</output>

<result>640</result>