A video recorder is now priced at 3570 yuan each, which is 15% lower than the original price. How much is the original price?
一种录像机，现在每台售价3570元，比原价降低了15%，原价多少元？
<gadget id="calculator">15 / 100</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">1 - (3/20)</gadget>
<output>17/20 = around 0.85</output>

<gadget id="calculator">3_570 / (17/20)</gadget>
<output>4_200</output>

<result>4_200</result>