To buy a car, you need to pay 10% more in installments, and you can get a 40% discount if you pay in cash. Uncle Wang did some calculations, and there was a price difference of 8,400 yuan between the two methods. How much is the original price of this car?
买一辆汽车，分期付款要多付10%，若现金付款能打九六折．王叔叔算了一下，两种方式有8400元的差价．这辆车原价是多少元？
<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">96 / 100</gadget>
<output>24/25 = around 0.96</output>

<gadget id="calculator">(1/10) - (24/25)</gadget>
<output>-43/50 = around -0.86</output>

<gadget id="calculator">1 + (-43/50)</gadget>
<output>7/50 = around 0.14</output>

<gadget id="calculator">8_400 / (7/50)</gadget>
<output>60_000</output>

<result>60_000</result>