The original price of a pair of trousers is 50 yuan, and the current price is 45 yuan, which is much lower than the original price.
一条裤子的原价是50元，现价是45元，比原来降价了多少．
<gadget id="calculator">50 - 45</gadget>
<output>5</output>

<gadget id="calculator">5 / 50</gadget>
<output>1/10 = around 0.1</output>

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