A woolen sweater is sold in a shopping mall. Now each piece is priced at 120 yuan, which is 25% off the original price. How much is the current price cheaper than before?
商场出售一种羊毛衫，现在每件的售价是120元，是原价的七五折，现在的售价比原来便宜了多少元？
<gadget id="calculator">75 / 100</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">120 / (3/4)</gadget>
<output>160</output>

<gadget id="calculator">160 - 120</gadget>
<output>40</output>

<result>40</result>