Shengli Road Primary School launched a donation campaign to support Beijing's bid to host the 2008 Olympic Games. Among them, the fifth grade donated 576 yuan, which is less than the sixth grade (1/4). How much is the sixth grade donation?
胜利路小学开展了支持北京申办2008年奥运会捐款活动．其中五年级捐款576元，比六年级少捐(1/4)．六年级捐款多少元？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">576 / (3/4)</gadget>
<output>768</output>

<result>768</result>