The original price of a commodity is 120 yuan, and the price is reduced by 10% in a promotional activity, what is the current price?
一种商品的原价是120元，在促销活动中降价10%销售，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">120 * (9/10)</gadget>
<output>108</output>

<result>108</result>