To support the prevention and control work in the SARS epidemic area, the fifth grade students donated 400 yuan, the fifth grade donated 6 grades (7/8), how much did the sixth grade donate?
支援非典疫区的防治工作，学校五年级的同学捐款400元，五年级捐款是六年级的(7/8)，六年级捐款多少元？
<gadget id="calculator">7 / 8</gadget>
<output>7/8 = around 0.875</output>

<gadget id="calculator">400 / (7/8)</gadget>
<output>3_200/7 = around 457.142857</output>

<result>3_200/7 = around 457.142857</result>