The school purchased 99 sets of single-person desks and chairs, each desk is 64 yuan, and each chair is 36 yuan. How much does the school spend on desks and chairs?
学校购买了99套单人课桌椅，课桌每张64元，椅子每把36元．学校购买课桌椅共花多少钱？
<gadget id="calculator">64 + 36</gadget>
<output>100</output>

<gadget id="calculator">100 * 99</gadget>
<output>9_900</output>

<result>9_900</result>