The current price of a tape recorder is 200 yuan each, which is 20% lower than the original price. How much did each unit sell for?
一种录音机的现价是每台200元，比原来降低了20%．原来每台售价多少元？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">200 / (4/5)</gadget>
<output>250</output>

<result>250</result>