The price of cucumbers on the market is 4.5 yuan per kilogram, which is 1.25 yuan more expensive than green vegetables per kilogram. How much does it cost to buy one kilogram of cucumbers and one kilogram of green vegetables?
菜场上黄瓜每千克售价4.5元，比每千克青菜贵1.25元，买一千克黄瓜与一千克青菜共需多少元？
<gadget id="calculator">4.5 - 1.25</gadget>
<output>3.25</output>

<gadget id="calculator">3.25 + 4.5</gadget>
<output>7.75</output>

<result>7.75</result>