4.20 Ya'an Earthquake 42 Class 50 students organized donations, just divided into groups of 6 and 4, and each group of 6 donated 100 yuan; each group of 4 donated 80 yuan. Please calculate how much the students in Class 4 and 2 donated at most?
4.20雅安地震四二班50名同学组织捐款，刚好分成6人与4人组，而6人一组每组捐款100元；4人一组每组捐款80元．请你算一算四二班同学最多捐款多少元？
<gadget id="calculator">11 * 80</gadget>
<output>880</output>

<gadget id="calculator">880 + 100</gadget>
<output>980</output>

<result>980</result>