Mom went to the street to buy apples, and the salesperson said: "The big and small apples are mixed and sold, and the price is 2.8 yuan per kilogram. If you only buy small apples, the price is 1.2 yuan per kilogram." Mom only buys big apples, so what is the price per kilogram? ?
妈妈上街买苹果，营业员说："大小苹果各一半混起来卖，每千克价2.8元，如果只买小苹果，每千克1.2元"，妈妈只买大苹果，那么每千克的价格是多少元？
<gadget id="calculator">2.8 * 2</gadget>
<output>5.6</output>

<gadget id="calculator">5.6 - 1.2</gadget>
<output>4.4</output>

<result>4.4</result>