A pair of cloth shoes is 7.8 yuan, and a pair of sneakers is 9.5 yuan. How much is a pair of sneakers more expensive than a pair of cloth shoes?
一双布鞋7.8元，一双球鞋9.5元，一双球鞋比一双布鞋贵多少元？
<gadget id="calculator">9.5 - 7.8</gadget>
<output>1.7</output>

<result>1.7</result>