A color TV is now priced at 1980 yuan each, which is 20% lower than the original price. How much was the original price?
一种彩色电视机，现在每台售价1980元，比原来价格降低了20%，原来售价多少元？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1_980 / (4/5)</gadget>
<output>2_475</output>

<result>2_475</result>