Aunt Li bought 2 kilograms of apples and 2 kilograms of pears, and spent a total of 20 yuan. It is known that each kilogram of pears is 4.4 yuan. How much is an apple per kilogram?
李阿姨买了苹果和梨各2千克，一共花了20元，已知每千克梨4.4元．每千克苹果多少钱？
<gadget id="calculator">20 / 2</gadget>
<output>10</output>

<gadget id="calculator">10 - 4.4</gadget>
<output>5.6</output>

<result>5.6</result>