There used to be 54 students in Class 1, Grade 6, Helan Primary School, of which boys accounted for the whole class (5/9). boy?
贺兰一小六年级一班原来有学生54人，其中男生占全班的(5/9)，后来男生转走了几人，现在男生占全班的(13/25)，转走了几名男生？
<gadget id="calculator">5 / 9</gadget>
<output>5/9 = around 0.555556</output>

<gadget id="calculator">54 * (5/9)</gadget>
<output>30</output>

<gadget id="calculator">54 - 30</gadget>
<output>24</output>

<gadget id="calculator">13 / 25</gadget>
<output>13/25 = around 0.52</output>

<gadget id="calculator">1 - (13/25)</gadget>
<output>12/25 = around 0.48</output>

<gadget id="calculator">24 / (12/25)</gadget>
<output>50</output>

<gadget id="calculator">54 - 50</gadget>
<output>4</output>

<result>4</result>