Class 1 of the sixth grade donated money to the victims of the Sichuan Earthquake. Each person originally donated 20 yuan, and there were 40 students in the class. Later, each person donated more (1/4). How much did the whole class actually donate?
六年级1班为四川大地震的灾民捐款，原来每人捐20元，全班有40人，后来每人又多捐(1/4)，实际全班共捐了多少元？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 + (1/4)</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">20 * (5/4) * 40</gadget>
<output>1_000</output>

<result>1_000</result>