If the price of a product is first increased by 10%, and then the price is reduced by 10%, the current price is 198 yuan, what is the original price?
某商品先涨价10%，后降价10%，现价198元，则原价多少元．
<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">198 / (9/10)</gadget>
<output>220</output>

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

<gadget id="calculator">220 / (11/10)</gadget>
<output>200</output>

<result>200</result>