A color TV is now priced at 1800 yuan, which is 1/10 lower than the original price. How much was the original price of each TV set?
一种彩电，现在售价为1800元，比原价降低(1/10)，原来每台售价多少元？
<gadget id="calculator">1 / 10</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_800 / (9/10)</gadget>
<output>2_000</output>

<result>2_000</result>