The current price of a sweater is 255 yuan, which is lower than the original price (2/7). How much is the original price?
一件毛衣现价255元，现在的价钱比原来降低了(2/7)．原价是多少元？
<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">255 / (5/7)</gadget>
<output>357</output>

<result>357</result>