The original price of a commodity is 8 yuan, now it is 2 yuan cheaper. How much cheaper.
一件商品的原价是8元，现在便宜了2元．便宜了多少．
<gadget id="calculator">2 / 8</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>