The original price of a refrigerator in the Five Star Electric Mall is 4,200 yuan. First, it was sold with a 20% discount, and then the price was reduced by 10%. How much is this refrigerator now?
五星电器商城一种冰箱原价4200元，先打八折优惠出售，后来又降价了10%，现在这款冰箱多少元？
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<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">4_200 * (4/5) * (9/10)</gadget>
<output>3_024</output>

<result>3_024</result>