The original price of a down jacket is 480 yuan, and it is sold at a 10% discount. How much is it cheaper?
一件羽绒服，原价是480元，九折出售，便宜了多少元
<gadget id="calculator">90 / 100</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">1 - (9/10)</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">480 * (1/10)</gadget>
<output>48</output>

<result>48</result>