Xiao Xiao bought a notebook with a unit price of 7.5 yuan, and the salesperson gave him back 0.5 yuan. How much did Xiao Xiao pay the salesperson?
肖肖买了一本单价是7.5元的笔记本，营业员给他找回0.5元，肖肖付给营业员多少元？
<gadget id="calculator">7.5 + 0.5</gadget>
<output>8</output>

<result>8</result>