The original price of a commodity is 200 yuan. After the price is reduced by 5%, the price is increased by 5%. What is the current price?
一件商品原价200元，降价5%后，又涨价5%，现价多少元．
<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">1 + (1/20)</gadget>
<output>21/20 = around 1.05</output>

<gadget id="calculator">200 * (19/20) * (21/20)</gadget>
<output>399/2 = around 199.5</output>

<result>399/2 = around 199.5</result>