The current price of a piece of clothing is 280 yuan, which is 30% lower than the original price. How much is the original price?
一件衣服现在的价格是280元，比原来降低了30%，原来的价格是多少元？
<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">280 / (7/10)</gadget>
<output>400</output>

<result>400</result>