There were 45 people in the mathematics interest group, of which boys accounted for 60% of the total number. Later, a few boys were transferred. At this time, boys accounted for 64% of the total number. How many students were transferred?
数学兴趣小组有45人，其中男生占总数的60%，后来又转入几名男生，这时男生占总人数的64%，转入了多少名学生？
<gadget id="calculator">60 / 100</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">45 * (2/5)</gadget>
<output>18</output>

<gadget id="calculator">64 / 100</gadget>
<output>16/25 = around 0.64</output>

<gadget id="calculator">1 - (16/25)</gadget>
<output>9/25 = around 0.36</output>

<gadget id="calculator">18 / (9/25)</gadget>
<output>50</output>

<gadget id="calculator">50 - 45</gadget>
<output>5</output>

<result>5</result>