The school purchased 50 sets of desks and chairs, each desk is 48 yuan, and each chair is 36 yuan. How much is the total cost?
学校购进50套桌椅，每张桌子48元，每把椅子36元，一共要用多少元？
<gadget id="calculator">48 + 36</gadget>
<output>84</output>

<gadget id="calculator">84 * 50</gadget>
<output>4_200</output>

<result>4_200</result>