The current price of a commodity is 9 yuan, which is 1 yuan lower than the original price. How much is the reduction?
一个商品现价9元，比原价降低了1元，降低了多少
<gadget id="calculator">1 + 9</gadget>
<output>10</output>

<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<result>1/10 = around 0.1</result>