My aunt went to the fruit shop to buy 2 kilograms of apples and 2 kilograms of pears, and the total cost was 11.2 yuan. Among them, 2.8 yuan per kilogram of pears, ask: How much is it per kilogram of apples?
阿姨去水果店买苹果和梨各2千克，总计花了11.2元．其中每千克梨2.8元，问：每千克苹果多少元？
<gadget id="calculator">2.8 * 2</gadget>
<output>5.6</output>

<gadget id="calculator">11.2 - 5.6</gadget>
<output>5.6</output>

<gadget id="calculator">5.6 / 2</gadget>
<output>2.8</output>

<result>2.8</result>