The current price of a piece of clothing is 210 yuan, which is 3/10 lower than the original price. What is the original price of this piece of clothing?
一件衣服现在的售价是210元，比原价降低了(3/10)，这件衣服的原价是多少元？
<gadget id="calculator">3 / 10</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">210 / (7/10)</gadget>
<output>300</output>

<result>300</result>