A TV set is priced at 4950 yuan after a 10% price increase and then a 10% price reduction. What is the original price of this TV set?
一台电视机，先提价10%再降价10%后的售价是4950元，这台电视机的原价是多少元？
<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 + (1/10)</gadget>
<output>11/10 = around 1.1</output>

<gadget id="calculator">1 - (1/10)</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">(11/10) * (9/10)</gadget>
<output>99/100 = around 0.99</output>

<gadget id="calculator">4_950 / (99/100)</gadget>
<output>5_000</output>

<result>5_000</result>