TV with an original price of 7,900 yuan is 15% lower than the original price for the first time, and 15% lower for the second time. How much is the current price of this TV?
一台原价为7900元的电视机，第一次比原价降低了15%，第二次又降低了15%．这台电视机现价多少元？
<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">7_900 * (17/20) * (17/20)</gadget>
<output>22_831/4 = around 5_707.75</output>

<result>22_831/4 = around 5_707.75</result>