The original price of a commodity is 500 yuan, the price is reduced by 10% for the first time, and 12% for the second time, find the current price.
一种商品的原价是500元，第一次降价10%，第二次降价12%，求现价．
<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 - (1/10)</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">12 / 100</gadget>
<output>3/25 = around 0.12</output>

<gadget id="calculator">1 - (3/25)</gadget>
<output>22/25 = around 0.88</output>

<gadget id="calculator">500 * (9/10) * (22/25)</gadget>
<output>396</output>

<result>396</result>