3.5 yuan per bag of melon seeds, 6.5 yuan per bag of jelly. Uncle Wang bought 8 bags of melon seeds and 8 bags of jelly, how much does it cost in total?
每袋瓜子3.5元，每袋果冻6.5元．王叔叔买了8袋瓜子和8袋果冻，一共要花多少钱？
<gadget id="calculator">3.5 + 6.5</gadget>
<output>10</output>

<gadget id="calculator">10 * 8</gadget>
<output>80</output>

<result>80</result>