There are 48 male teachers in a certain school, accounting for (4/5) of the total number of teachers in the school. After transferring several female teachers, female teachers accounted for (1/4) of the teachers in the whole school. How many female teachers were transferred?
某学校有男教师48人，占全校教师人数的(4/5)．调入几名女教师后，女教师占全校教师的(1/4)，调入女教师多少人？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">48 / (3/4)</gadget>
<output>64</output>

<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">48 / (4/5)</gadget>
<output>60</output>

<gadget id="calculator">64 - 60</gadget>
<output>4</output>

<result>4</result>