The original price of a commodity is 80 yuan, and the price is reduced by 5% and then the price is reduced by 5%. What is the current price?
一件商品原价80元，降价5%后又降价5%，现价有多少元．
<gadget id="calculator">5 / 100</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">1 - (1/20)</gadget>
<output>19/20 = around 0.95</output>

<gadget id="calculator">80 * (19/20) * (19/20)</gadget>
<output>361/5 = around 72.2</output>

<result>361/5 = around 72.2</result>