Students from Honghua Elementary School donated money to the children in the Yushu disaster area. The sixth grade donated 500 yuan, the fifth grade donated to the sixth grade (4/5), and the fourth grade donated to the fifth grade (9/8). How much is the fourth grade donation?
红花小学得同学给玉树灾区的小朋友捐款．六年级捐了500元，五年级捐的是六年级的(4/5)，四年级捐的是五年级的(9/8)．四年级捐款多少元？
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">9 / 8</gadget>
<output>9/8 = around 1.125</output>

<gadget id="calculator">500 * (4/5) * (9/8)</gadget>
<output>450</output>

<result>450</result>