A DVD is sold at 25% off the original price, which is 600 yuan. How much less is this DVD sold for?
一台DVD按原价的七五折出售是600元，这台DVD少卖多少元？
<gadget id="calculator">75 / 100</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">600 / (3/4)</gadget>
<output>800</output>

<gadget id="calculator">800 - 600</gadget>
<output>200</output>

<result>200</result>