Aunt Zhang bought a box of 24kg of Red Fuji apples at the wholesale market for 52.8 yuan. She took them to her small fruit shop and sold them at a price of 5 yuan per kilogram. How much did she earn after a box of apples was sold out? ?
张阿姨在批发市场买了一箱24千克的红富士苹果，花了52.8元，拿到她的小水果店，以每千克5元的价格出售，一箱苹果卖完后，她赚了多少钱？
<gadget id="calculator">5 * 24</gadget>
<output>120</output>

<gadget id="calculator">120 - 52.8</gadget>
<output>67.2</output>

<result>67.2</result>