Xiao Ming wants to buy 5 photo albums and 5 mechanical pencils. It costs 28.75 yuan to buy the photo album and 11.15 yuan to buy the mechanical pencil. How much is a photo album more expensive than a mechanical pencil?
小明要买5本相册和5支自动铅笔，买相册用了28.75元，买自动铅笔用了11.15元，一本相册比一支自动铅笔贵多少元．
<gadget id="calculator">28.75 - 11.15</gadget>
<output>17.6</output>

<gadget id="calculator">17.6 / 5</gadget>
<output>3.52</output>

<result>3.52</result>