The students of Experimental Primary School donated to the Yushu disaster area, with an average donation of 45 yuan per class. There are 6 grades and 5 classes in each grade. How much did they donate in total?
实验小学的同学为玉树灾区捐款，平均每个班捐45元，有6个年级，每个年级5个班，他们一共捐了多少钱？
<gadget id="calculator">45 * 5 * 6</gadget>
<output>1_350</output>

<result>1_350</result>