This year, the school purchased 52 sets of desks and chairs. A table is 45 yuan, and a chair is 25 yuan. How much did the school spend?
今年学校购进52套课桌椅，一张桌子45元，一把椅子25元，学校共花了多少元．
<gadget id="calculator">45 + 25</gadget>
<output>70</output>

<gadget id="calculator">70 * 52</gadget>
<output>3_640</output>

<result>3_640</result>