The school bought 80 sets of desks and chairs, each desk was 83 yuan, and each chair was 42 yuan. How much did the school spend on buying desks and chairs? (Note: A set of desks and chairs includes a desk and a chair)
学校买来80套课桌椅，每张课桌83元，每把椅子42元，学校买课桌椅一共用了多少元？(说明：一套课桌椅包括一张课桌和一把椅子)
<gadget id="calculator">83 + 42</gadget>
<output>125</output>

<gadget id="calculator">125 * 80</gadget>
<output>10_000</output>

<result>10_000</result>