A ballpoint pen is 0.80 yuan, and a fountain pen is 6.80 yuan. How much will it cost to buy a fountain pen and a ballpoint pen?
一枝圆珠笔0.80元，一枝钢笔6.80元，买一枝钢笔和一枝圆珠笔一共要付多少元？
<gadget id="calculator">0.8 + 6.8</gadget>
<output>7.6</output>

<result>7.6</result>