Xiao Ming bought a Walkman, and after enjoying a 10% discount, he only spent 144 yuan, how much cheaper than the original price?
小明买一部随身听，享受九折优惠后只花了144元，比原价便宜了多少元？
<gadget id="calculator">90 / 100</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">144 / (9/10)</gadget>
<output>160</output>

<gadget id="calculator">160 - 144</gadget>
<output>16</output>

<result>16</result>