The original price of a TV set is 1000 yuan, how much is it after the price is reduced by 10% twice in a row?
一部电视机原价1000元，连续两次降价10%后是多少元．
<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_000 * (9/10) * (9/10)</gadget>
<output>810</output>

<result>810</result>