The current price of a windbreaker is 280 yuan, which is 3/7 lower than the original price. How much was the original price of this windbreaker?
一件风衣现在售价280元，比原来降低(3/7)，这件风衣原来售价多少元？
<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">1 - (3/7)</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">280 / (4/7)</gadget>
<output>490</output>

<result>490</result>