In the donation activity for the Indian Ocean earthquake and tsunami-stricken areas, the fifth grade students donated a total of 480 yuan, 20% more than the sixth grade. How much more do fifth graders donate than sixth graders?
在为印度洋地震海啸灾区捐款活动中，五年级同学共捐款480元，比六年级多捐20%．五年级同学比六年级多捐款多少元？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">480 / (6/5)</gadget>
<output>400</output>

<gadget id="calculator">480 - 400</gadget>
<output>80</output>

<result>80</result>