A desk is 85 yuan, a chair is 45 yuan, and the school bought 120 sets of desks and chairs. How much will you pay in total?
一张课桌85元，一张椅子45元，学校买了120套课桌椅．一共要付多少钱？
<gadget id="calculator">85 + 45</gadget>
<output>130</output>

<gadget id="calculator">130 * 120</gadget>
<output>15_600</output>

<result>15_600</result>