After increasing 200 by 10%, then decreasing it by 10%, what is the result?
把200增加10%以后，再减少10%，结果为多少．
<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>