After the price of a TV is reduced by 15%, the price is 2040 yuan. How much is its original price?
一台电视机降价15%后，售价为2040元．它的原价是多少元？
<gadget id="calculator">15 / 100</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">1 - (3/20)</gadget>
<output>17/20 = around 0.85</output>

<gadget id="calculator">2_040 / (17/20)</gadget>
<output>2_400</output>

<result>2_400</result>