The price of a piece of clothing is 180 yuan, which is (1/10) lower than the original price. How much is the reduction?
一件衣服售价180元，比原价降低了(1/10)，降低了多少元？
<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 - (1/10)</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">180 / (9/10)</gadget>
<output>200</output>

<result>200</result>