A certain brand of TV has a promotional activity, and the price is reduced by 10%. On this basis, the mall returns 3% of the selling price in cash. How much is this brand of TV equivalent to a price reduction?
某品牌电视机进行促销活动，降价10%．在此基础上，商场又返还售价的3%现金，这个品牌的电视机，相当于降价百分之几？
<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">3 / 100</gadget>
<output>3/100 = around 0.03</output>

<gadget id="calculator">1 - (3/100)</gadget>
<output>97/100 = around 0.97</output>

<gadget id="calculator">(9/10) * (97/100)</gadget>
<output>873/1_000 = around 0.873</output>

<gadget id="calculator">1 - (873/1_000)</gadget>
<output>127/1_000 = around 0.127</output>

<result>127/1_000 = around 0.127</result>