The original price of a certain product is 50 yuan, and the price is reduced twice in a row, each time the price is reduced by 10%, what is the current price?
某种商品原价50元，连续两次降价，每次降价10%，现价为多少元．
<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">50 * (9/10) * (9/10)</gadget>
<output>81/2 = around 40.5</output>

<result>81/2 = around 40.5</result>