Mom bought 2.8 kilograms of grapes and spent a total of 35 yuan. It is known that apples are 4.8 yuan cheaper per kilogram than grapes. How much is the price of apples per kilogram?
妈妈买了2.8千克的葡萄，共花了35元，已知每千克的苹果比葡萄便宜4.8元，每千克苹果的价钱是多少元？
<gadget id="calculator">35 / 2.8</gadget>
<output>12.5</output>

<gadget id="calculator">12.5 - 4.8</gadget>
<output>7.7</output>

<result>7.7</result>