A person saves 25 yuan by buying a set of clothes at a discounted price of 20%, how much is actually used to buy the suit
某人以八折优惠价买一套服装省了25元，那么买这套服装实际用了多少元
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 - (4/5)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">25 / (1/5)</gadget>
<output>125</output>

<gadget id="calculator">125 - 25</gadget>
<output>100</output>

<result>100</result>