The price of a computer is 4,000 yuan, the price is first reduced by 10%, and then the price is reduced by 10%, how much is the total price reduction.
一台电脑售价4000元，先降价10%，再降价10%，一共降价多少元．
<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">4_000 * (9/10) * (9/10)</gadget>
<output>3_240</output>

<gadget id="calculator">4_000 - 3_240</gadget>
<output>760</output>

<result>760</result>