Dad bought a walkman, the original price was 320 yuan, and now he only spent 10% off, how much cheaper than the original price?
爸爸买了一个随身听，原价320元，现在只花了九折的钱，比原价便宜了多少钱？
<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">320 * (1/10)</gadget>
<output>32</output>

<result>32</result>