Xiaohua and Xiaoli put out the same money to buy apples, Xiaohua took 8 kilograms, and Xiaoli took 12 kilograms. In this way, Xiaoli will give Xiaohua 16 yuan. What is the unit price of apples per kilogram?
小华和小力拿出同样的钱买苹果，小华拿了8千克，小力拿了12千克．这样小力就要给小华16元．苹果的单价是每千克多少元．
<gadget id="calculator">8 + 12</gadget>
<output>20</output>

<gadget id="calculator">20 / 2</gadget>
<output>10</output>

<gadget id="calculator">12 - 10</gadget>
<output>2</output>

<gadget id="calculator">16 / 2</gadget>
<output>8</output>

<result>8</result>