A commodity worth 200 yuan is first raised by 10% and then reduced by 10%. What is the price of this commodity now?
一件200元的商品，先提价10%后又降价10%，现在这件商品的价格是多少元．
<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 + (1/10)</gadget>
<output>11/10 = around 1.1</output>

<gadget id="calculator">1 - (1/10)</gadget>
<output>9/10 = around 0.9</output>

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

<result>198</result>