The original price of a coat is 200 yuan. After the price is reduced by 10%, the price is increased by 10%. What is the current price?
一件上衣原价200元，降价10%以后又提价10%，现价是多少元．
<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">1 + (1/10)</gadget>
<output>11/10 = around 1.1</output>

<gadget id="calculator">200 * (9/10) * (11/10)</gadget>
<output>198</output>

<result>198</result>