A computer is priced at 2,700 yuan after a 10% discount. How much has the price of this computer been reduced?
一台电脑打九折后的售价2700元，这台电脑降价了多少元．
<gadget id="calculator">90 / 100</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">2_700 / (9/10)</gadget>
<output>3_000</output>

<gadget id="calculator">3_000 - 2_700</gadget>
<output>300</output>

<result>300</result>