A type of towel in Ebian Dongfanghong Supermarket was priced at 50 yuan. Later, the price was reduced (1/10) after the event, and the price was increased (1/10) after the event. How much are you selling now?
峨边东方红超市的一种毛巾标价50元，后来搞活动降价(1/10)，活动完后又涨价(1/10)．现在卖多少钱？
<gadget id="calculator">1 / 10</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">50 * (9/10) * (11/10)</gadget>
<output>99/2 = around 49.5</output>

<result>99/2 = around 49.5</result>