There are two baskets of apples, the first basket is 25 kg, and the second basket is 29 kg. The price of the first basket is 12.8 yuan less than that of the second basket. How much is the apple per kilogram?
有两筐苹果，第一筐25千克，第二筐29千克，第一筐比第二筐少卖了12.8元，每千克苹果多少元？
<gadget id="calculator">29 - 25</gadget>
<output>4</output>

<gadget id="calculator">12.8 / 4</gadget>
<output>3.2</output>

<result>3.2</result>