The original price of a commodity is 200 yuan, and now it is sold at a 25% discount. How much is the current price cheaper than the original price?
一件商品原价200元，现按七五折出售，现价比原价便宜多少元．
<gadget id="calculator">75 / 100</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 - (3/4)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">200 * (1/4)</gadget>
<output>50</output>

<result>50</result>