The price of a certain product has been reduced twice, the first time the price has been reduced by 10%, and the second time the price has been reduced by 20%, what percentage of the current price is equivalent to the original price?
某商品先后两次降价，第一次降价10%，第二次降价20%，现价相当于原价的百分之几？
<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">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">(9/10) * (4/5)</gadget>
<output>18/25 = around 0.72</output>

<result>18/25 = around 0.72</result>