The selling price of a VCD player is 420 yuan, which is a reduction (2/7) from the original price. What was the original price?
一种VCD影碟机的售价是420元，比原来降价(2/7)．原来的价钱是多少元？
<gadget id="calculator">2 / 7</gadget>
<output>2/7 = around 0.285714</output>

<gadget id="calculator">1 - (2/7)</gadget>
<output>5/7 = around 0.714286</output>

<gadget id="calculator">420 / (5/7)</gadget>
<output>588</output>

<result>588</result>