Uncle Wang sells two baskets of apples with the same unit price, one is 19 kilograms, the other is 25 kilograms; the price difference between the two baskets of apples is 26.4 yuan. What is the average price of an apple per kilogram?
王大伯卖出两筐单价相同的苹果，一筐是19千克，另一筐是25千克；两筐苹果所卖的钱相差26.4元．平均每千克苹果的价钱是多少元？
<gadget id="calculator">25 - 19</gadget>
<output>6</output>

<gadget id="calculator">26.4 / 6</gadget>
<output>4.4</output>

<result>4.4</result>