500 kilograms of apples are 28 kilograms less than oranges. How many kilograms are oranges? what is the correct formula
苹果500千克，比桔子少28千克，桔子有多少千克？正确的算式是多少
<gadget id="calculator">500 + 28</gadget>
<output>528</output>

<result>528</result>