A color TV set is sold in a department store, and the price is reduced by 10% during the May Day period, and the price of each set is 1980 yuan. Please do the math, how much is the original price of this TV set?
百货大楼出售一种彩色电视机，五一期间降价10%，每台售价1980元．请你算一算，这种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>9/10 = around 0.9</output>

<gadget id="calculator">1_980 / (9/10)</gadget>
<output>2_200</output>

<result>2_200</result>