The Songkran Festival promotion in the home appliance shopping mall, refrigerators will be sold at 15% off. If a customer buys a refrigerator worth 3,500 yuan, how much money can he save?
家电商场泼水节促销，冰箱一律八五折销售．如果顾客买一台价值3500元的冰箱，能节省多少元钱？
<gadget id="calculator">85 / 100</gadget>
<output>17/20 = around 0.85</output>

<gadget id="calculator">1 - (17/20)</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">3_500 * (3/20)</gadget>
<output>525</output>

<result>525</result>