After the price of each tape recorder is reduced by 30%, the price is 350 yuan. How much is the original price of this tape recorder?
录音机每台降价30%后，售价350元，这种录音机原来售价多少元？
<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">1 - (3/10)</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">350 / (7/10)</gadget>
<output>500</output>

<result>500</result>