A TV set was sold for 2975 yuan with a 15% discount on the May Day event. How much did you save by buying this TV compared to usual?
一台电视机五一搞活动打八五折销售为2975元，买这台电视机比平时省了多少元？
<gadget id="calculator">85 / 100</gadget>
<output>17/20 = around 0.85</output>

<gadget id="calculator">2_975 / (17/20)</gadget>
<output>3_500</output>

<gadget id="calculator">3_500 - 2_975</gadget>
<output>525</output>

<result>525</result>