The school bought back 18 packs of "Primary School Students' World", 20 volumes in each pack, and 1.45 yuan per volume. How much did you spend in total?
学校买回18包《小学生天地》，每包20册，每册1.45元，一共用了多少钱？
<gadget id="calculator">18 * 20 * 1.45</gadget>
<output>522</output>

<result>522</result>