Two classes of the fourth grade of Dongyang Primary School donated 876.5 yuan to the disaster area, and one class donated 298.4 yuan. How much does the second class donate?
东阳小学四年级两个班向灾区捐款876.5元，其中一班捐298.4元．二班捐多少元？
<gadget id="calculator">876.5 - 298.4</gadget>
<output>578.1</output>

<result>578.1</result>