After a certain organization streamlined its organization, there were 135 staff members, which was 25% less than the original staff. How many people were reduced?
某机关精简机构后，有工作人员135人，比原有工作人员减少了25%，减少了多少人？
<gadget id="calculator">25 / 100</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">135 / (3/4)</gadget>
<output>180</output>

<gadget id="calculator">180 - 135</gadget>
<output>45</output>

<result>45</result>