A desk is 80 yuan, a stool is 40 yuan; the school plans to buy 50 sets of such desks and stools, how much will it cost in total?
一张课桌80元，一条凳子40元；学校准备买50套这样的课桌凳，一共需要多少钱？
<gadget id="calculator">80 + 40</gadget>
<output>120</output>

<gadget id="calculator">120 * 50</gadget>
<output>6_000</output>

<result>6_000</result>