The teachers and students of the fourth to sixth grades of Hongguang Elementary School donated to the disaster area, with an average donation of 750 yuan per grade. It is also known that the ratio of the donations of the three grades is 2:3:4, how much is the donation of the sixth grade teachers and students.
红光小学四-六年级的师生为灾区捐款，平均每个年级捐款750元，又知三个年级捐款钱数的比是2：3：4，六年级师生捐款多少元．
<gadget id="calculator">2 + 3 + 4</gadget>
<output>9</output>

<gadget id="calculator">4 / 9</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">750 * 3 * (4/9)</gadget>
<output>1_000</output>

<result>1_000</result>