The store sells 2 baskets of apples with the same price, the first basket is 25 kg, and the second basket is 28 kg. The price of the first basket is 15.6 yuan less than that of the second basket. How much is the average price per kilogram?
商店卖出2筐价格相同的苹果，第1筐25千克，第2筐28千克．第1筐比第2筐少卖15.6元，平均每千克几元？
<gadget id="calculator">28 - 25</gadget>
<output>3</output>

<gadget id="calculator">15.6 / 3</gadget>
<output>5.2</output>

<result>5.2</result>