The price of a desk is 72 yuan, and the price of a chair is 28 yuan. How much does it cost to buy such 50 sets of desks and chairs?
一张课桌的价格为72元，一把椅子的价格为28元，买这样的50套课桌椅需要多少钱？
<gadget id="calculator">72 + 28</gadget>
<output>100</output>

<gadget id="calculator">100 * 50</gadget>
<output>5_000</output>

<result>5_000</result>